Produits et services

Photometers; air quality measurement apparatus, namely, particle counters; accessories and replacement parts for photometers and particle counters, namely, autozero modules, inlet caps, batteries, pumps, filters, calibration devices, mounts, solar panels for production of electricity, power supplies, and cascade impactors; downloadable computer application software for mobile phones, namely, software for viewing and downloading data from aerosol monitoring instruments.

Produits et services

Handheld test instrument with swappable sensors for the measurement of particulate matter, air velocity, temperature, humidity, differential pressure, TVOC, noise, and heat stress.

Produits et services

Gas and liquid flow and temperature sensors; laser velocimetry units and parts therefor; optical components for laser velocimetry units; lasers; signal processors, computers; computer interface units and computer programs for use with gas or liquid flow measurement apparatus, namely, for collecting, processing, analyzing, storing, and presenting data from gas or liquid flow measuring instruments; preamplifiers; polarization axis finders; frequency shifters; hot wire and hot film anemometers; anemometry instruments and parts therefor; computer programs and interface units for use with anemometers, namely, for collecting, processing, analyzing, storing, and presenting data from anemometers and anemometry instruments; anemometer probes and sensors; manometers; gas flow and velocity test instruments; mass flow transducers; air velocity transducers, signal conditioners, air velocity meters; air velocity meter calibrators; wind velocity sensors; intelligent flow analyzers featuring microchips, for measuring flow rate and accumulation of liquids and gases; air pollution measuring and/or control instruments; aerosol neutralizers; condensation nucleus counters; electrical classifiers; electrostatic aerosol samplers; isokinetic dust samplers; electronic respirable aerosol mass monitors; particle impactors; computer programs and interface units for use with particle technology instruments, namely, for collecting, processing, analyzing, storing, and presenting data from instruments measuring particle size and/or concentration; measurement instruments for use in determining aerodynamic particle size; optical particle counters; differential mobility particle size analyzers; fume hood controllers; monitors for measuring the velocity of particles moving in a media; surface motion monitors; room pressure sensors; room pressure controllers; wind tunnels; flow calibrators; mass flow meters; ventilator test instruments; condensation particle counters; surface area monitors; lung deposition monitors, namely, an aerosol characterization device used to infer inhaled particulate uprate; mass flow meters to measure air flow in exposure monitoring applications; electronic instrumentation used in industrial hygiene and occupational exposure monitoring applications; in situ particle sizing instruments; phase doppler particle analyzers; planar laser induced fluorescent instruments; microscale particle image velocimetry instruments; multi-phase flow measurement instruments; velocity measurement devices; laser doppler velocimeters; nanoparticle/macromolecule generators.

Produits et services

(1) Gas and liquid flow and temperature sensors; laser velocimetry units and parts therefor; optical components for laser velocimetry units; lasers; signal processors, computers; computer interface units and computer programs for use with gas or liquid flow measurement apparatus, namely, for collecting, processing, analyzing, storing, and presenting data from gas or liquid flow measuring instruments; preamplifiers; polarization axis finders; frequency shifters; hot wire and hot film anemometers; anemometry instruments and parts therefor; computer programs and interface units for use with anemometers, namely, for collecting, processing, analyzing, storing, and presenting data from anemometers and anemometry instruments; anemometer probes and sensors; manometers; gas flow and velocity test instruments; mass flow transducers; air velocity transducers, signal conditioners, air velocity meters; air velocity meter calibrators; wind velocity sensors; intelligent flow analyzers featuring microchips, for measuring flow rate and accumulation of liquids and gases; air pollution measuring and/or control instruments; aerosol neutralizers; condensation nucleus counters; electrical classifiers; electrostatic aerosol samplers; isokinetic dust samplers; electronic respirable aerosol mass monitors; particle impactors; computer programs and interface units for use with particle technology instruments, namely, for collecting, processing, analyzing, storing, and presenting data from instruments measuring particle size and/or concentration; measurement instruments for use in determining aerodynamic particle size; optical particle counters; differential mobility particle size analyzers; fume hood controllers; monitors for measuring the velocity of particles moving in a media; surface motion monitors; room pressure sensors; room pressure controllers; wind tunnels; flow calibrators; mass flow meters; ventilator test instruments; condensation particle counters; surface area monitors; lung deposition monitors, namely, an aerosol characterization device used to infer inhaled particulate uprate; mass flow meters to measure air flow in exposure monitoring applications; electronic instrumentation used in industrial hygiene and occupational exposure monitoring applications; in situ particle sizing instruments; phase doppler particle analyzers; planar laser induced fluorescent instruments; microscale particle image velocimetry instruments; multi-phase flow measurement instruments; velocity measurement devices; laser doppler velocimeters; nanoparticle/macromolecule generator

Produits et services

Personal noise dosimeter for monitoring personal noise exposure levels.

Produits et services

(1) Handheld test instrument with swappable sensors for the measurement of particulate matter, air velocity, temperature, humidity, differential pressure, TVOC, noise, and heat stress.

Abrégé

Disclosed herein are systems and methods for measuring and controlling a flow rate through a particle counter or active air sampler. As disclosed herein, a fluid flows through a venturi tube and an orifice in the system at a predetermine velocity. A pressure differential between an inlet of the instrument and a throat section of the venturi tube is measured. The flow rate through the system can be determined based on the pressure differential and an intensive property of the fluid. An alarm can be activated when the flow rate is outside of a flow rate range.

Classes IPC  ?

• G01F 1/44 - Tubes de Venturi
• G01N 1/24 - Dispositifs d'aspiration
• G01F 1/42 - Orifices ou tuyères
• G01F 1/36 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression la pression ou la différence de pression étant produite par une contraction de la veine fluide
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/14 - Recherche par des moyens électro-optiques

Abrégé

Disclosed herein are systems and methods for measuring and controlling a flow rate through a particle counter or active air sampler. As disclosed herein, a flow is created within a conduit fluidly connected to an instrument at a first velocity. An inlet pressure at an inlet of the instrument and an ambient pressure proximate the instrument are measured. The flow rate through the instrument is determined based on a pressure differential between the inlet pressure and the ambient pressure. The flow rate is increased or decreased when the flow rate is outside a flow rate range.

Classes IPC  ?

• G01N 1/24 - Dispositifs d'aspiration
• G05D 7/06 - Commande de débits caractérisée par l'utilisation de moyens électriques
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux

Produits et services

Personal noise dosimeter for monitoring personal noise exposure levels

Produits et services

Gas and liquid flow and temperature sensors; laser velocimetry units and parts therefor; optical components for laser velocimetry units; lasers; signal processors, computers; computer interface units and computer programs for use with gas or liquid flow measurement apparatus, namely, for collecting, processing, analyzing, storing, and presenting data from gas or liquid flow measuring instruments; preamplifiers; polarization axis finders; frequency shifters; hot wire and hot film anemometers; anemometry instruments and parts therefor; computer programs and interface units for use with anemometers, namely, for collecting, processing, analyzing, storing, and presenting data from anemometers and anemometry instruments; anemometer probes and sensors; manometers; gas flow and velocity test instruments; mass flow transducers; air velocity transducers, signal conditioners, air velocity meters; air velocity meter calibrators; wind velocity sensors; intelligent flow analyzers featuring microchips, for measuring flow rate and accumulation of liquids and gases; air pollution measuring and/or control instruments; aerosol neutralizers; condensation nucleus counters; electrical classifiers; electrostatic aerosol samplers; isokinetic dust samplers; electronic respirable aerosol mass monitors; particle impactors; computer programs and interface units for use with particle technology instruments, namely, for collecting, processing, analyzing, storing, and presenting data from instruments measuring particle size and/or concentration; measurement instruments for use in determining aerodynamic particle size; optical particle counters; differential mobility particle size analyzers; fume hood controllers; monitors for measuring the velocity of particles moving in a media; surface motion monitors; room pressure sensors; room pressure controllers; wind tunnels; flow calibrators; mass flow meters; ventilator test instruments; condensation particle counters; surface area monitors; lung deposition monitors, namely, an aerosol characterization device used to infer inhaled particulate uprate; mass flow meters to measure air flow in exposure monitoring applications; electronic instrumentation used in industrial hygiene and occupational exposure monitoring applications; in situ particle sizing instruments; phase doppler particle analyzers; planar laser induced fluorescent instruments; microscale particle image velocimetry instruments; multi-phase flow measurement instruments; velocity measurement devices; laser doppler velocimeters; nanoparticle/macromolecule generator

Produits et services

Gas and liquid flow and temperature sensors; lasers; signal processors; computers; preamplifiers; polarization axis finders; computer programs and interface units for use with anemometers, namely, for collecting, processing, analyzing, storing, and presenting data from anemometers and anemometry instruments; manometers; gas flow and velocity test instruments; mass flow transducers; air velocity transducers, signal conditioners, air velocity meters; air velocity meter calibrators; wind velocity sensors; intelligent flow analyzers featuring microchips, for measuring flow rate and accumulation of liquids and gases; air pollution measuring and/or control instruments; aerosol neutralizers; condensation nucleus counters; electrical classifiers; electrostatic aerosol samplers; isokinetic dust samplers; electronic respirable aerosol mass monitors; particle impactors; computer programs and interface units for use with particle technology instruments, namely, for collecting, processing, analyzing, storing, and presenting data from instruments measuring particle size and/or concentration; computer programs and interface units for use with particle technology instruments, namely, for collecting, processing, analyzing, storing, and presenting data from instruments measuring particle size and/or concentration; measurement instruments for use in determining aerodynamic particle size; clean room particle counters; optical particle counters; differential mobility particle size analyzers; fume hood controllers; monitors for measuring the velocity of particles moving in a media; surface motion monitors; room pressure sensors; room pressure controllers; wind tunnels; flow calibrators; mass flow meters; ventilator test instruments; condensation particle counters; surface area monitors; lung deposition monitors, namely, an aerosol characterization device used to infer inhaled particulate uprate; mass flow meters to measure air flow in exposure monitoring applications; electronic instrumentation used in industrial hygiene and occupational exposure monitoring applications; in situ particle sizing instruments; velocity measurement devices; nanoparticle/macromolecule generators; aerosol and dust monitors; generators and dispensers; sound level meters and detectors; hospital room pressure monitors; heat stress monitor; airflow air capture hood; noise indicator; laboratory room controller; fume hood monitor; environmental monitor; noise dosimeter; balometer capture hood; ventilation meter; laser photometer; aerosol monitor; air quality monitor; vaporizers; computer cables

Produits et services

Providing online non-downloadable videos in the field of respirator fit testing and filter testing; education services, namely, providing non-downloadable webinars in the fields of aerosols and nanoparticles, environmental air monitoring, automotive and engine emission, particle counting, particle sizing, indoor ventilation and health effects, testing home healthcare devices, and pharmaceutical manufacturing; conducting seminars in the field of aerosol science

Produits et services

apparatus for depositing particles on semiconductor wafers; vaporizers; liquid flow controllers; semiconductor process vapor filters; sample recovery systems for particle impactors; pharmaceutical particle impactors; washers for particle impactors; ultrapure water monitor and apparatus for deposition of particles within ultrapure water

Produits et services

Photometers; air quality measurement apparatus, namely, particle counters; accessories and replacement parts for photometers and particle counters, namely, autozero modules, inlet caps, batteries, pumps, filters, calibration devices, mounts, solar panels for production of electricity, power supplies, and cascade impactors; downloadable computer application software for mobile phones, namely, software for viewing and downloading data from aerosol monitoring instruments

Produits et services

Handheld test instrument with swappable sensors for the measurement of particulate matter, air velocity, temperature, humidity, differential pressure, TVOC, noise, and heat stress

Produits et services

Charms for key chains; charms for jewellery; unwrought and semi-wrought precious stones and their imitations; key rings in the nature of trinkets or fobs; jewelry cases; prize cups of precious metals; ornaments of precious metal in the nature of jewelry; personal jewellery; shoe ornaments of precious metal, namely, jewelry for shoes; clocks and watches Clothing for domestic pets; bags for sports; traveling bags; all-purpose carrying bags; carry-all bags; shoe bags for travel, namely, bags for keeping golf shoes while traveling; pouches for holding make-up, keys and other personal items; purses and wallets; key cases; business card cases; leather pouches; felt pouches; drawstring pouches; clutch bags; unfitted vanity cases; umbrellas; walking sticks; canes; cane and walking stick handles Sun visor caps; golf shoes; clothing, namely, neck warmers; golf caps; golf shorts; golf skirts; golf trousers; non-Japanese style outer clothing, namely, trench coats; coats; sweaters; shirts; pants; nightwear; underwear; bathing suits; bathing caps; Japanese traditional clothing, namely, kimonos; clothing, namely, cowls; nightcaps; hats; caps being headwear; sleep masks; aprons; socks; leg gaiters; fur stoles; shawls; scarves; gloves being clothing; neckties; neckerchiefs; bandanas and neckerchiefs; mufflers being clothing; ear muffs; garters; sock suspenders; suspenders and braces for clothing; waistbands; belts for clothing; golf spikes; shoes; boots Golf club bags; covers for golf club heads; cases for golf balls; pouches for golf balls; fitted covers for golf club bags; golf bags, with or without wheels; golf balls; golf club covers; golf clubs; golf gloves; golf tees; golf tee bags; golf bag tags; markers for golf balls; toys, namely, action figures; dolls; go board games; Japanese chess (shogi games); Japanese dice games (sugoroku); chess games; checkers games; apparatus for performing magic tricks; playing cards; Japanese playing cards (hanafuda); mah-jong; game machines and apparatus, namely, amusement game machines; billiard equipment; fishing tackle

Abrégé

A fluid system includes a capillary and a first and second temperature sensor, a first and second pressure sensor, and a processor coupled to the sensors. The processor is configured to execute instructions to determine an output using the sensor data and using fluid parameter data received via an interface coupled to the processor. The processor is coupled to a control in fluid communication with the capillary.

Classes IPC  ?

• G05D 7/06 - Commande de débits caractérisée par l'utilisation de moyens électriques

Abrégé

A fluid system includes a capillary and a first and second temperature sensor, a first and second pressure sensor, and a processor coupled to the sensors. The processor is configured to execute instructions to determine an output using the sensor data and using fluid parameter data received via an interface coupled to the processor. The processor is coupled to a control in fluid communication with the capillary.

Classes IPC  ?

• G01F 1/88 - Débitmètres massiques indirects, p.ex. mesurant le débit volumétrique et la densité, la température ou la pression avec mesure de la différence de pression pour déterminer le débit volumétrique
• E21B 43/12 - Procédés ou appareils pour commander l'écoulement du fluide extrait vers ou dans les puits
• G01F 1/36 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression la pression ou la différence de pression étant produite par une contraction de la veine fluide
• G01F 1/37 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression la pression ou la différence de pression étant produite par une contraction de la veine fluide la pression ou la différence de pression étant mesurée au moyen de tubes ou de vases communiquants avec des niveaux variables de fluide, p.ex. tubes en U
• G01F 1/38 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression la pression ou la différence de pression étant produite par une contraction de la veine fluide la pression ou la différence de pression étant mesurée au moyen d'un élément mobile, p.ex. une membrane, un piston, un tube de Bourdon ou une capsule déformable
• G01F 1/48 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en mesurant la pression ou la différence de pression la pression ou la différence de pression étant produite par un élément capillaire
• G01F 1/76 - Dispositifs pour mesurer le débit massique d'un fluide ou d'un matériau solide fluent

Abrégé

Disclosed are systems and methods for measuring flowrates. The systems and methods may include passing a fluid from a unit under test into a cavity. The pressure of the fluid within the cavity may be measure and a slidable element located within the cavity may be repositioned to maintain a desired pressure within the cavity. The distance traveled by the slidable element in order to maintain the desired pressure may be determined along with a time for the slidable element to travel the distance. Using the distance traveled by the slidable element, a crosssectional area of the slidable element in contact with the fluid, and the time for the slidable element to travel the distance the volumetric flowrate for the fluid may be determined.

Classes IPC  ?

• G01F 25/10 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume des débitmètres
• G01F 3/16 - Mesure du débit volumétrique des fluides ou d'un matériau solide fluent dans laquelle le fluide passe à travers le compteur par quantités successives et plus ou moins séparées, le compteur étant entraîné par l'écoulement avec des chambres de mesure qui se dilatent ou se contractent au cours du mesurage ayant des parois rigides mobiles comprenant des pistons animés d'un mouvement alternatif, p.ex. se déplaçant d'un mouvement alternatif dans un corps tournant dans des cylindres fixes

Abrégé

Various embodiments include an exemplary design of a high-temperature condensation particle counter (HT-CPC) having particle-counting statistics that are greatly improved over prior art systems since the sample flow of the disclosed HT-CPC is at least eight times greater than the prior art systems. In one embodiment, the HT-CPC includes a saturator block to accept directly a sampled particle-laden gas flow, a condenser block located downstream and in fluid communication with the saturator block, an optics block located downstream and in fluid communication with the condenser block, and a makeup-flow block having a concentric-tube design located in fluid communication with and between the condenser block and the optics block. The makeup-flow block being configured to reduce volatile contents from re-nucleating in the optics block. Other designs and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/14 - Recherche par des moyens électro-optiques

Abrégé

A measurement system includes an atomizer, an impactor, a particle counter, and a discharge reservoir. The atomizer has a liquid intake port and a gas intake port configured to aerosolize a liquid received at the liquid intake port. The impactor has an inlet coupled to the atomizer and has a first output port and a second output port. The impactor is configured to separate droplets wherein those droplets smaller than a selected cut point are directed to the first output port and those droplets larger than the selected cut point are directed to the second output port. The particle counter is coupled to the first output port and is configured to count particles larger than at least one particle size cut point. The discharge reservoir is coupled to the second output port.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• B01D 39/20 - Autres substances filtrantes autoportantes en substance inorganique, p.ex. papier d'amiante ou substance filtrante métallique faite de fils métalliques non-tissés
• G01F 23/263 - Indication ou mesure du niveau des liquides ou des matériaux solides fluents, p.ex. indication en fonction du volume ou indication au moyen d'un signal d'alarme en mesurant des variables physiques autres que les dimensions linéaires, la pression ou le poids, selon le niveau à mesurer, p.ex. par la différence de transfert de chaleur de vapeur ou d'eau en mesurant les variations de capacité ou l'inductance de condensateurs ou de bobines produites par la présence d'un liquide ou d'un matériau solide fluent dans des champs électriques ou électromagnétiques en mesurant les variations de capacité de condensateurs
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules

Abrégé

A measurement system includes an atomizer, an impactor, a particle counter, and a discharge reservoir. The atomizer has a liquid intake port and a gas intake port configured to aerosolize a liquid received at the liquid intake port. The impactor has an inlet coupled to the atomizer and has a first output port and a second output port. The impactor is configured to separate droplets wherein those droplets smaller than a selected cut point are directed to the first output port and those droplets larger than the selected cut point are directed to the second output port. The particle counter is coupled to the first output port and is configured to count particles larger than at least one particle size cut point. The discharge reservoir is coupled to the second output port.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

Various embodiments include an exemplary apparatus and method for insitu calibration of multiple flow-sensing devices within a dilution system. In one example, a calibration and dilution system includes a first mass-flow device to serve as a global reference, a second mass-flow device configured to be coupled to and provide a supply of clean gas to a primary diluter, and a third mass-flow device configured to be coupled to and provide a supply of clean gas to a secondary diluter, where the diluters are pneumatically coupled to one another through a gas-supply line. Multiple valves are coupled to at least the mass-flow devices and the diluters. The calibration and dilution system is arranged so that the mass-flow controllers can be calibrated in-situ without having to remove any of the mass-flow controllers from the calibration and dilution system. Other apparatuses, designs, and methods are disclosed.

Classes IPC  ?

• G01N 35/00 - Analyse automatique non limitée à des procédés ou à des matériaux spécifiés dans un seul des groupes ; Manipulation de matériaux à cet effet
• G01N 1/38 - Dilution, dispersion ou mélange des échantillons
• G01N 1/20 - Dispositifs pour prélever des échantillons à l'état liquide ou fluide pour matériau coulant ou s'éboulant
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/10 - Recherche de particules individuelles
• G01N 15/14 - Recherche par des moyens électro-optiques

Abrégé

Various embodiments include systems and apparatuses for reducing contamination levels within optical chambers of particle-detection instruments. In one embodiment, an apparatus to reduce contamination within an optical chamber of a particle-detection instrument is described. The apparatus includes a plenum chamber to at least partially surround an aerosol-focusing nozzle of the particle-detection instrument and accept a filtered gas flow. A curtain-flow concentrating nozzle is coupled to the plenum chamber to produce a curtain flow into the optical chamber to substantially surround an aerosol flow. Other methods and systems are disclosed.

Classes IPC  ?

• G01N 1/40 - Concentration des échantillons
• F15D 1/02 - Action sur l'écoulement des fluides dans les tuyaux ou les conduits
• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

A system includes a polymer bag, a fluid network, a saturation block, and a wick. The polymer bag has a sealed envelope and a fitment. The fluid network is coupled to the fitment. The saturation block has a fluid inlet coupled to the fluid network and has a wick chamber. The wick is configured for disposition in the wick chamber.

Classes IPC  ?

• G01N 27/22 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la capacité
• G01N 27/12 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la résistance d'un corps solide dépendant de la réaction avec un fluide

Produits et services

Providing temporary use of an online software for connecting, operating, and managing networked scientific measurement instruments; providing temporary use of an online platform providing analytics and actionable insights by monitoring networked scientific measurement instruments.

Produits et services

Sensors for measuring gases, particulates, smoke, dust, and other air pollutants; sensors for measuring temperature and humidity.

Produits et services

Sensors for measuring gases, particulates, smoke, dust, and other air pollutants; sensors for measuring temperature and humidity.

Abrégé

Disclosed herein are systems and methods for measuring and controlling a flow rate through a particle counter or active air sampler. As disclosed herein, a fluid flows through a venturi tube and an orifice in the system at a predetermine velocity. A pressure differential between an inlet of the instrument and a throat section of the venturi tube is measured. The flow rate through the system can be determined based on the pressure differential and an intensive property of the fluid. An alarm can be activated when the flow rate is outside of a flow rate range.

Classes IPC  ?

• G01F 1/44 - Tubes de Venturi
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 1/24 - Dispositifs d'aspiration
• G01N 15/14 - Recherche par des moyens électro-optiques

Produits et services

sensors for measuring gases, particulates, smoke, dust, and other air pollutants; sensors for measuring temperature and humidity

Produits et services

sensors for measuring gases, particulates, smoke, dust, and other air pollutants; sensors for measuring temperature and humidity

Produits et services

providing temporary use of non-downloadable cloud-based software for connecting, operating, and managing networked scientific measurement instruments; providing temporary use of an online non-downloadable software platform for providing analytics and actionable insights by monitoring networked scientific measurement instruments

Abrégé

Various embodiments include an exemplary design of an apparatus and related process to reduce or eliminate de-gassing from a liquid precursor during dispensing of the liquid precursor under vacuum. In one embodiment, the apparatus includes a liquid-flow controller configured to be coupled to a liquid-supply vessel containing the liquid precursor, and at least one valve hydraulically coupled downstream of and to the liquid-flow controller by a liquid line. The at least one valve is to be opened and closed to maintain a minimum pressure that is sufficiently high enough to reduce or prevent degassing of the liquid precursor throughout the liquid line. An atomizer is hydraulically coupled downstream of and to the at least one valve. The atomizer can produce droplets of the liquid precursor and is further to be coupled on a downstream side to a vacuum source. Other methods and apparatuses are disclosed.

Classes IPC  ?

• B01D 19/00 - Dégazage de liquides

Abrégé

Various embodiments include methods and apparatuses to reduce false-particle counts in a water-based condensation particle counter (CPC). In one embodiment, a cleanroom CPC has three parallel growth tube assemblies. A detector is coupled to an outlet of each of the three parallel growth tube assemblies, and is used to compare the particle concentrations measured from each of the three growth tube assemblies with remaining ones of the three growth tube assemblies. An algorithm compares the counts from the three detectors and determines when the particles counted are real and when they are false counts. Any real particle event shows up in all three detectors, while false counts will only be detected by one detector. Statistics are used to determine at which particle count levels the measured counts are considered to be real versus false. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 15/10 - Recherche de particules individuelles
• G01N 35/00 - Analyse automatique non limitée à des procédés ou à des matériaux spécifiés dans un seul des groupes ; Manipulation de matériaux à cet effet

Abrégé

Various embodiments include an exemplary design of a high-temperature condensation particle counter (HT-CPC) having particle-counting statistics that are greatly improved over prior art systems since the sample flow of the disclosed HT-CPC is at least eight times greater than the prior art systems. In one embodiment, the HT-CPC includes a saturator block to accept directly a sampled particle-laden gas flow, a condenser block located downstream and in fluid communication with the saturator block, an optics block located downstream and in fluid communication with the condenser block, and a makeup-flow block having a concentric-tube design located in fluid communication with and between the condenser block and the optics block. The makeup-flow block being configured to reduce volatile contents from re-nucleating in the optics block. Other designs and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

A system includes a first and second condensation particle counter, each counter having an inlet port, a growth column, and an optical element for counting particles detected at the respective inlet ports. The counters are configured to include a wick in which the wick is wetted by water. A differential pressure sensor is coupled to the first inlet port and coupled to the second inlet port. The sensor is configured to provide a pressure signal. A processor is coupled to memory and configured to receive the first signal, the second signal, and the pressure signal and generate an output corresponding to a ratio of the first signal and the second signal and correlate the ratio with the pressure signal. A housing is configured to receive the first counter, the second counter, the differential pressure sensor, the processor, and the memory.

Classes IPC  ?

• A62B 27/00 - Méthodes ou dispositifs pour tester des appareils respiratoires
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

A seed dispensing system is provided with a photoelectric sensor for monitoring the dispensing of seeds from a seed dispenser comprising a discharge conveyor with conveyor flights that transport seeds through the seed dispenser. The sensor outputs a signal representative of obstructions to the flow of light in an optical path of the sensor, and a computing unit is adapted to distinguish portions of the output signal that are attributable to the passage of one or more seeds from portions of the output signal that are attributable to the passage of a conveyor flight.

Classes IPC  ?

• A01C 7/10 - Dispositifs de réglage de la caisse à semences
• A01C 7/08 - Semoirs à la volée; Semoirs en lignes
• G01N 21/00 - Recherche ou analyse des matériaux par l'utilisation de moyens optiques, c. à d. en utilisant des ondes submillimétriques, de la lumière infrarouge, visible ou ultraviolette
• H01L 31/00 - Dispositifs à semi-conducteurs sensibles aux rayons infrarouges, à la lumière, au rayonnement électromagnétique d'ondes plus courtes, ou au rayonnement corpusculaire, et spécialement adaptés, soit comme convertisseurs de l'énergie dudit rayonnement e; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives; Leurs détails

Abrégé

A particle velocimetry system and algorithm are provided for executing a particle reconstruction to determine three-dimensional positions of particles in a particle laden fluid flow from two-dimensional flow images generated by two-dimensional image sensors; generate a three-dimensional particle distribution from the three-dimensional position; and execute a recursive loop for performing further iterations of particle reconstruction and generation of three-dimensional particle distributions, with recursive iterations of particle reconstruction executed with the use of particle property data obtained from the prior executed iteration of particle reconstruction.

Classes IPC  ?

• G06T 7/246 - Analyse du mouvement utilisant des procédés basés sur les caractéristiques, p.ex. le suivi des coins ou des segments
• G01P 5/00 - Mesure de la vitesse des fluides, p.ex. d'un courant atmosphérique; Mesure de la vitesse de corps, p.ex. navires, aéronefs, par rapport à des fluides
• G06T 7/73 - Détermination de la position ou de l'orientation des objets ou des caméras utilisant des procédés basés sur les caractéristiques

Abrégé

There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.

Classes IPC  ?

• G01K 13/02 - Thermomètres spécialement adaptés à des fins spécifiques pour mesurer la température de fluides en mouvement ou de matériaux granulaires capables de s'écouler
• G01P 5/12 - Mesure de la vitesse des fluides, p.ex. d'un courant atmosphérique; Mesure de la vitesse de corps, p.ex. navires, aéronefs, par rapport à des fluides en mesurant des variables thermiques en utilisant la variation de la résistance d'un conducteur chauffé
• F01D 17/08 - Aménagement des éléments sensibles sensibles aux conditions de fonctionnement du fluide énergétique, p.ex. à la pression
• G01K 1/14 - Supports; Dispositifs de fixation; Dispositions pour le montage de thermomètres en des endroits particuliers
• G01K 13/024 - Thermomètres spécialement adaptés à des fins spécifiques pour mesurer la température de fluides en mouvement ou de matériaux granulaires capables de s'écouler de gaz en mouvement

Abrégé

Disclosed are systems and methods for measuring flowrates. The systems and methods may include passing a fluid from a unit under test into a cavity. The pressure of the fluid within the cavity may be measure and a slidable element located within the cavity may be repositioned to maintain a desired pressure within the cavity. The distance traveled by the slidable element in order to maintain the desired pressure may be determined along with a time for the slidable element to travel the distance. Using the distance traveled by the slidable element, a crosssectional area of the slidable element in contact with the fluid, and the time for the slidable element to travel the distance the volumetric flowrate for the fluid may be determined.

Classes IPC  ?

• G01F 25/00 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume
• G01F 3/16 - Mesure du débit volumétrique des fluides ou d'un matériau solide fluent dans laquelle le fluide passe à travers le compteur par quantités successives et plus ou moins séparées, le compteur étant entraîné par l'écoulement avec des chambres de mesure qui se dilatent ou se contractent au cours du mesurage ayant des parois rigides mobiles comprenant des pistons animés d'un mouvement alternatif, p.ex. se déplaçant d'un mouvement alternatif dans un corps tournant dans des cylindres fixes

Abrégé

Various embodiments include an exemplary apparatus and method for insitu calibration of multiple flow-sensing devices within a dilution system. In one example, a calibration and dilution system includes a first mass-flow device to serve as a global reference, a second mass-flow device configured to be coupled to and provide a supply of clean gas to a primary diluter, and a third mass-flow device configured to be coupled to and provide a supply of clean gas to a secondary diluter, where the diluters are pneumatically coupled to one another through a gas-supply line. Multiple valves are coupled to at least the mass-flow devices and the diluters. The calibration and dilution system is arranged so that the mass-flow controllers can be calibrated in-situ without having to remove any of the mass-flow controllers from the calibration and dilution system. Other apparatuses, designs, and methods are disclosed.

Classes IPC  ?

• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 1/38 - Dilution, dispersion ou mélange des échantillons
• G05D 7/06 - Commande de débits caractérisée par l'utilisation de moyens électriques

Abrégé

Various embodiments include systems and apparatuses for reducing contamination levels within optical chambers of particle -detection instruments. In one embodiment, an apparatus to reduce contamination within an optical chamber of a particle-detection instrument is described. The apparatus includes a plenum chamber to at least partially surround an aerosol -focusing nozzle of the p article- detection instrument and accept a filtered gas flow. A curtain-flow concentrating nozzle is coupled to the plenum chamber to produce a curtain flow into the optical chamber to substantially surround an aerosol flow. Other methods and systems are disclosed.

Classes IPC  ?

• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

A system includes a polymer bag, a fluid network, a saturation block, and a wick. The polymer bag has a sealed envelope and a fitment. The fluid network is coupled to the fitment. The saturation block has a fluid inlet coupled to the fluid network and has a wick chamber. The wick is configured for disposition in the wick chamber.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

Various embodiments include methods and systems to dilute a sampled particle-laden aerosol stream in a recirculating type of aerosol diluter system. In one embodiment, a system to dilute a sampled aerosol stream includes an aerosol sample inlet. A primary diluter device includes a first inlet to receive the aerosol stream and a second inlet to receive a filtered portion of the aerosol stream and combining the filtered portion with an additional sampled aerosol stream. A flow diverter device splits at least the sampled aerosol stream into a first portion of the sampled aerosol stream and a remaining portion of the sampled aerosol stream. A filter receives the remaining portion of the sampled aerosol stream and provides a filtered aerosol stream to the second inlet of the primary diluter device. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 1/38 - Dilution, dispersion ou mélange des échantillons
• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux

Produits et services

Sound level meters; vibration meters; gas flow monitors.

Abrégé

The respirator fit monitor described herein can be worn continuously by users so as to provide an indication as to how well their masks are fitting during use, thereby providing quantitative, wearable fit testers available for continuous use in real-life situations. The monitor includes a low-cost optical particle sensor assembly and controller unit for performing mask fit tests by comparing particle concentrations inside and outside of the mask. The fit test monitor is low cost and wearable, capable of dual sampling, capable of fit factor ratios well above 100, is battery powered and provides near real time measurements with a means for indicating the fit of the mask. The system includes wired or wireless communications for data logging, analysis and display capabilities.

Classes IPC  ?

• A62B 27/00 - Méthodes ou dispositifs pour tester des appareils respiratoires
• A62B 9/00 - DISPOSITIFS, APPAREILS OU PROCÉDÉS DE SAUVETAGE - Parties constitutives des appareils respiratoires
• G01M 3/20 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par détection de la présence du fluide à l'emplacement de la fuite en utilisant des révélateurs particuliers, p.ex. teinture, produits fluorescents, produits radioactifs
• G01M 3/38 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation de la lumière
• G01M 3/28 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par mesure du taux de perte ou de gain d'un fluide, p.ex. avec des dispositifs réagissant à la pression, avec des indicateurs de débit pour soupapes
• G01M 3/04 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par détection de la présence du fluide à l'emplacement de la fuite
• G01M 3/32 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par mesure du taux de perte ou de gain d'un fluide, p.ex. avec des dispositifs réagissant à la pression, avec des indicateurs de débit pour récipients, p.ex. radiateurs
• G01M 3/26 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par mesure du taux de perte ou de gain d'un fluide, p.ex. avec des dispositifs réagissant à la pression, avec des indicateurs de débit

Produits et services

(1) Sound level meters; vibration meters; gas flow monitors.

Abrégé

Various embodiments include methods and apparatuses to reduce false-particle counts in a water-based condensation particle counter (CPC). In one embodiment, a cleanroom CPC has three parallel growth tube assemblies. A detector is coupled to an outlet of each of the three parallel growth tube assemblies, and is used to compare the particle concentrations measured from each of the three growth tube assemblies. An algorithm compares the counts from the three detectors and determines when the particles counted are real and when they are false counts. Any real particle event shows up in all three detectors, while false counts will only be detected by one detector. Statistics are used to determine at which particle count levels the measured counts are considered to be real versus false. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 15/10 - Recherche de particules individuelles
• G01N 35/00 - Analyse automatique non limitée à des procédés ou à des matériaux spécifiés dans un seul des groupes ; Manipulation de matériaux à cet effet

Produits et services

Sound level meters; vibration meters; gas flow monitors

Abrégé

Various embodiments include an exemplary design of an apparatus and related process to reduce or eliminate de-gassing from a liquid precursor during dispensing of the liquid precursor under vacuum. In one embodiment, the apparatus includes a liquid-flow controller configured to be coupled to a liquid-supply vessel containing the liquid precursor, and at least one valve hydraulically coupled downstream of and to the liquid-flow controller by a liquid line. The at least one valve is to be opened and closed to maintain a minimum pressure that is sufficiently high enough to reduce or prevent degassing of the liquid precursor throughout the liquid line. An atomizer is hydraulically coupled downstream of and to the at least one valve. The atomizer can produce droplets of the liquid precursor and is further to be coupled on a downstream side to a vacuum source. Other methods and apparatuses are disclosed.

Classes IPC  ?

• C23C 16/448 - Revêtement chimique par décomposition de composés gazeux, ne laissant pas de produits de réaction du matériau de la surface dans le revêtement, c. à d. procédés de dépôt chimique en phase vapeur (CVD) caractérisé par le procédé de revêtement caractérisé par le procédé utilisé pour produire des courants de gaz réactifs, p.ex. par évaporation ou par sublimation de matériaux précurseurs
• C23C 16/52 - Commande ou régulation du processus de dépôt
• C23C 16/455 - Revêtement chimique par décomposition de composés gazeux, ne laissant pas de produits de réaction du matériau de la surface dans le revêtement, c. à d. procédés de dépôt chimique en phase vapeur (CVD) caractérisé par le procédé de revêtement caractérisé par le procédé utilisé pour introduire des gaz dans la chambre de réaction ou pour modifier les écoulements de gaz dans la chambre de réaction

Abrégé

Various embodiments include methods and systems for reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into multiple wicks used for transporting separate portions of an aerosol sample flow, with the wicks extending from a wick stand on a first end to a flow joiner on a second end, combining particles from the separate portions of the aerosol sample flow into a single aerosol stream within the flow joiner prior to transporting the combined aerosol sample stream into a particle detection chamber within the CPC, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water in a collection reservoir, and after receiving a signal corresponding to the excess volume of water, draining the excess volume of water from the collection reservoir. Other methods, systems, and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

An apparatus and method for use in determining one or more fluid flow properties of a fluid in a conduit is disclosed. The apparatus includes a substrate including a barrier, a first flow sensor coupled to the substrate and a second flow sensor coupled to the substrate. The first flow sensor is located at a first sensor distance from a first barrier surface, and the second flow sensor is located a second sensor distance from the second barrier surface. The first sensor distance is substantially equal to the second sensor distance. In operation, the first flow sensor produces a first sensor signal, and the second flow sensor produces a second sensor signal. The direction of flow for the fluid is determined by comparing the first sensor signal to the second sensor signal.

Classes IPC  ?

• G01F 1/684 - Dispositions de structure; Montage des éléments, p.ex. relativement à l'écoulement de fluide
• G01F 1/69 - Dispositions de structure; Montage des éléments, p.ex. relativement à l'écoulement de fluide utilisant un élément de chauffage, de refroidissement ou de détection d'un type particulier du type à résistance
• G01F 1/72 - Dispositifs pour la mesure des débits pulsatoires
• G01P 13/00 - Indication ou enregistrement de l'existence ou de l'absence d'un mouvement; Indication ou enregistrement de la direction d'un mouvement
• G01F 15/00 - MESURE DES VOLUMES, DES DÉBITS VOLUMÉTRIQUES, DES DÉBITS MASSIQUES OU DU NIVEAU DES LIQUIDES; COMPTAGE VOLUMÉTRIQUE - Détails des appareils des groupes ou accessoires pour ces derniers, dans la mesure où de tels accessoires ou détails ne sont pas adaptés à ces types particuliers d'appareils, p.ex. pour l'indication à distance
• G01F 1/692 - Dispositions à couche mince
• H01L 29/00 - DISPOSITIFS À SEMI-CONDUCTEURS NON COUVERTS PAR LA CLASSE - Détails des corps semi-conducteurs ou de leurs électrodes
• G01F 25/00 - Test ou étalonnage des appareils pour la mesure du volume, du débit volumétrique ou du niveau des liquides, ou des appareils pour compter par volume

Abrégé

An apparatus and method for use in determining one or more fluid flow properties of a fluid in a conduit is disclosed. The apparatus includes a substrate including a barrier, a first flow sensor coupled to the substrate and a second flow sensor coupled to the substrate. The first flow sensor is located at a first sensor distance from a first barrier surface, and the second flow sensor is located a second sensor distance from the second barrier surface. The first sensor distance is substantially equal to the second sensor distance. In operation, the first flow sensor produces a first sensor signal, and the second flow sensor produces a second sensor signal. The direction of flow for the fluid is determined by comparing the first sensor signal to the second sensor signal.

Classes IPC  ?

• G01F 1/68 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets thermiques
• G01F 1/684 - Dispositions de structure; Montage des éléments, p.ex. relativement à l'écoulement de fluide
• F15D 1/02 - Action sur l'écoulement des fluides dans les tuyaux ou les conduits
• G01F 1/075 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en utilisant des aubes tournantes avec admission tangentielle avec accouplement magnétique ou électromagnétique au dispositif indicateur
• G01F 1/11 - Mesure du débit volumétrique ou du débit massique d'un fluide ou d'un matériau solide fluent, dans laquelle le fluide passe à travers un compteur par un écoulement continu en utilisant des effets mécaniques en utilisant des aubes tournantes avec admission axiale avec accouplement mécanique au dispositif indicateur
• G01F 1/325 - Moyens de détection de quantités utilisées comme variables de substitution corrélées à l’effet des tourbillons

Abrégé

Various embodiments include an exemplary design of a high-temperature condensation particle counter (HT-CPC) having particle-counting statistics that are greatly improved over prior art systems since the sample flow of the disclosed HT-CPC is at least eight times greater than the prior art systems. In one embodiment, the HT-CPC includes a saturator block to accept directly a sampled particle-laden gas flow, a condenser block located downstream and in fluid communication with the saturator block, an optics block located downstream and in fluid communication with the condenser block, and a makeup-flow block having a concentric-tube design located in fluid communication with and between the condenser block and the optics block. The makeup-flow block being configured to reduce volatile contents from re-nucleating in the optics block. Other designs and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 15/14 - Recherche par des moyens électro-optiques

Abrégé

Various embodiments include methods and systems to measure and calibrate an optical particle spectrometer for reporting mass concentration. In one embodiment, an optical particle spectrometer is used to measure a concentration of particulate matter in a sampled particle-laden airstream. A particle diverter, in fluid communication with the spectrometer, diverts at least a portion of the particle-laden airstream at predetermined intervals. In one example, a mass filter receives the portion of the particle-laden airstream and filters a fraction of the particles within the airstream that are above a predetermined particle size. A mass sensor measures a mass of the fraction of the particles received from the mass filter or from the particle diverter and uses a calibration communication loop to provide the measured mass to the spectrometer to apply a correction factor to report mass concentration from the optical particle spectrometer. Other methods and systems are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

Various embodiments include composite wicks for ultra-low noise condensation particle counters (CPCs). In one embodiment, a composite wick includes a first porous material having a first pore density, with the first porous material further having a first surface and an opposing second surface. A second porous material is in fluid communication with the first porous material and has a first surface with an area substantially the same as an area of the first surface of the first porous material. The first surface of the second porous material is substantially in contact with the first surface of the first porous material. The second porous material has a pore density that is dissimilar the first pore density of the first material. The first material and the second material are configured to provide vapor from a liquid to a fluid-based particle counter. Other apparatuses are disclosed.

Classes IPC  ?

• B01D 47/00 - Séparation de particules dispersées dans l'air, des gaz ou des vapeurs en utilisant un liquide comme agent de séparation
• G01N 15/06 - Recherche de la concentration des suspensions de particules
• B01D 5/00 - Condensation de vapeurs; Récupération de solvants volatils par condensation
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• B05C 3/00 - Appareillages dans lesquels un ouvrage est mis en contact avec une grande quantité de liquide ou autre matériau fluide
• B05C 3/02 - Appareillages dans lesquels un ouvrage est mis en contact avec une grande quantité de liquide ou autre matériau fluide l'ouvrage étant immergé dans le liquide ou autre matériau fluide

Abrégé

A particle velocimetry system and algorithm are provided for executing a particle reconstruction to determine three-dimensional positions of particles in a particle laden fluid flow from two-dimensional flow images generated by two-dimensional image sensors; generate a three-dimensional particle distribution from the three-dimensional position; and execute a recursive loop for performing further iterations of particle reconstruction and generation of three-dimensional particle distributions, with recursive iterations of particle reconstruction executed with the use of particle property data obtained from the prior executed iteration of particle reconstruction.

Classes IPC  ?

• G01P 5/00 - Mesure de la vitesse des fluides, p.ex. d'un courant atmosphérique; Mesure de la vitesse de corps, p.ex. navires, aéronefs, par rapport à des fluides
• G01N 15/14 - Recherche par des moyens électro-optiques
• G06T 7/70 - Détermination de la position ou de l'orientation des objets ou des caméras
• G06F 17/17 - Opérations mathématiques complexes Évaluation de fonctions par des procédés d'approximation, p.ex. par interpolation ou extrapolation, par lissage ou par le procédé des moindres carrés

Abrégé

The disclosed subject matter compensates or corrects for errors that otherwise would be present when a measurement is made on a condensation particle counting system with the only difference causing the errors being absolute pressure. The difference in absolute pressure may be due to, for example, a change in altitude in which the condensation particle counting system is located. Techniques and mechanisms are disclosed to compensate for changes in particle count, at a given particle diameter, for changes in sampled absolute pressure at which measurements are taken. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

The disclosed subject matter compensates or corrects for errors that otherwise would be present when a measurement is made on a condensation particle counting system with the only difference causing the errors being absolute pressure. The difference in absolute pressure may be due to, for example, a change in altitude in which the condensation particle counting system is located. Techniques and mechanisms are disclosed to compensate for changes in particle count, at a given particle diameter, for changes in sampled absolute pressure at which measurements are taken. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/08 - Recherche de la perméabilité, du volume des pores ou de l'aire superficielle des matériaux poreux
• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 15/14 - Recherche par des moyens électro-optiques

Abrégé

There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.

Classes IPC  ?

• G01K 13/02 - Thermomètres spécialement adaptés à des fins spécifiques pour mesurer la température de fluides en mouvement ou de matériaux granulaires capables de s'écouler
• G01P 5/12 - Mesure de la vitesse des fluides, p.ex. d'un courant atmosphérique; Mesure de la vitesse de corps, p.ex. navires, aéronefs, par rapport à des fluides en mesurant des variables thermiques en utilisant la variation de la résistance d'un conducteur chauffé
• F01D 17/08 - Aménagement des éléments sensibles sensibles aux conditions de fonctionnement du fluide énergétique, p.ex. à la pression
• G01K 1/14 - Supports; Dispositifs de fixation; Dispositions pour le montage de thermomètres en des endroits particuliers

Abrégé

Various embodiments include methods and systems to dilute a sampled particle-laden aerosol stream. In one embodiment, a system to dilute a sampled aerosol stream includes an aerosol sample inlet. A filter is coupled in fluid communication with and in parallel with a flow-monitoring device to receive the sampled aerosol stream from the aerosol sample inlet. The flow-monitoring device is configured to allow for a passage of particles contained in the sampled aerosol stream. A pressure sensor and a temperature sensor monitor the filter and the flow-monitoring device. An output from the filter and the flow-monitoring device may be directed to particle measurement or particle sizing instrumentation. An actual dilution ratio of the output sent to the particle measurement or particle sizing instrumentation is determined based on a nominal flowrate of the flow-monitoring device and thermodynamic properties of a gas comprising the aerosol stream. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 1/38 - Dilution, dispersion ou mélange des échantillons
• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux

Abrégé

A microwave moisture sensor for agricultural materials, such as grains and nuts, is disclosed herein that includes a material sample holder having a substantially cylindrical cavity formed therein. The meter assembly further includes a transmitting antenna on a side of the sample holder and a receiving antenna on a side of sample holder directly opposite the transmitting antenna wherein the sample holder is located between the two antennas, the receiving antenna configured to receive a transmitted microwave through the sample holder.

Classes IPC  ?

• G01N 22/04 - Recherche de la teneur en eau
• G01N 24/08 - Recherche ou analyse des matériaux par l'utilisation de la résonance magnétique nucléaire, de la résonance paramagnétique électronique ou d'autres effets de spin en utilisant la résonance magnétique nucléaire
• G01N 33/02 - Nourriture
• G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
• G01N 22/00 - Recherche ou analyse des matériaux par l'utilisation de micro-ondes ou d'ondes radio, c. à d. d'ondes électromagnétiques d'une longueur d'onde d'un millimètre ou plus
• G01N 24/00 - Recherche ou analyse des matériaux par l'utilisation de la résonance magnétique nucléaire, de la résonance paramagnétique électronique ou d'autres effets de spin

Abrégé

Various embodiments include methods and systems to calibrate a gain of a photodetector. A method can include providing, by a reference light source, first light to a reference photodetector, determining, by controller circuitry, whether a first value from the reference photodetector produced in response to the first light is within a range of acceptable reference photodetector values, in response to determining the first value is within the range of acceptable reference photodetector values, providing, by the reference light source, second light to a measurement photodetector, determining, by the controller circuitry, whether a second value from the measurement photodetector produced in response to the second light is within a range of acceptable measurement photodetector values, and in response to determining the second value is not within the range of acceptable measurement photodetector values, adjusting a gain of the measurement photodetector.

Classes IPC  ?

• G01N 15/10 - Recherche de particules individuelles
• G01N 15/14 - Recherche par des moyens électro-optiques

Abrégé

There is disclosed a field calibratable particle sensor solution in a low-cost, very compact form factor. This makes a low-cost sensor more accurate for low-concentration pollution measurements and decreases the cost of pollution measurement systems having a wide geographic coverage. In a related embodiment, the invention illustrates a method and system to remotely and automatically calibrate one or more of the low cost sensors disclosed herein as well as other commercially available sensors (such as optical particle counters, photometers etc.) against a reference instrument (such as a beta attenuation monitor) which may or may not be physically located in the same place as the individual sensors. The method may require minimum (or no) user interaction and the calibration period is adjustable periodically.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux

Abrégé

There is disclosed a system and apparatus for connecting remote and environmental sensors and other operating systems to a portable computing and communications device. The portable device configured to receive and process a set of data and transmit a response or message to at least the user on the quality of the data received. The portable device adapted to reconfigure the remote sensors or operating systems to produce a new set of data.

Classes IPC  ?

• G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
• G01L 19/08 - Moyens pour l'indication ou l'enregistrement, p.ex. pour l'indication à distance
• G01D 1/18 - Dispositions pour la mesure donnant des résultats autres que la valeur instantanée d'une variable, d'application générale avec dispositions pour signaler le dépassement d'une valeur prédéterminée d'un paramètre non spécifié
• G01D 21/00 - Mesures ou tests non prévus ailleurs
• F24F 3/16 - Systèmes de conditionnement d'air dans lesquels l'air conditionné primaire est fourni par une ou plusieurs stations centrales aux blocs de distribution situés dans les pièces ou enceintes, blocs dans lesquels il peut subir un traitement secondaire; Appareillage spécialement conçu pour de tels systèmes caractérisés par le traitement de l'air autrement que par chauffage et refroidissement par ozonisation
• F24F 11/30 - Aménagements de commande ou de sécurité en relation avec le fonctionnement du système, p.ex. pour la sécurité ou la surveillance
• F24F 11/83 - Aménagements de commande ou de sécurité - Détails de construction de tels systèmes pour la commande de la température de l’air fourni en commandant l’apport en fluides échangeurs de chaleur aux échangeurs de chaleur
• F24F 110/50 - Propriétés liées à la qualité de l’air
• F24F 11/52 - Aménagements pour l’indication, p.ex. écrans

Abrégé

In one example embodiment, a seed sensor is disclosed adapted to fit a conventional mounting location in existing seed tubes that provides improved performance by providing a wide light source (more LEDS), a wide photodetector and a current profiling scheme for the LEDs that provides more light at the opposite ends of the LED array. A result of such an arrangement is to improve seed resolution and to reduce seed spatial variability within the seed tube.

Classes IPC  ?

• A01C 7/10 - Dispositifs de réglage de la caisse à semences
• A01C 7/20 - Eléments de semoirs pour guider et déposer les graines
• G01B 11/14 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la distance ou la marge entre des objets ou des ouvertures espacés

Abrégé

Various embodiments include methods and systems to measure and calibrate an optical particle spectrometer for reporting mass concentration. In one embodiment, an optical particle spectrometer is used to measure a concentration of particulate matter in a sampled particle-laden airstream. A particle diverter, in fluid communication with the spectrometer, diverts at least a portion of the particle-laden airstream at predetermined intervals. In one example, a mass filter receives the portion of the particle-laden airstream and filters a fraction of the particles within the airstream that are above a predetermined particle size. A mass sensor measures a mass of the fraction of the particles received from the mass filter or from the particle diverter and uses a calibration communication loop to provide the measured mass to the spectrometer to apply a correction factor to report mass concentration from the optical particle spectrometer. Other methods and systems are disclosed.

Classes IPC  ?

• G01N 15/10 - Recherche de particules individuelles
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 21/25 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

Various embodiments include composite wicks for ultra-low noise condensation particle counters (CPCs). In one embodiment, a composite wick includes a first porous material having a first pore density, with the first porous material further having a first surface and an opposing second surface. A second porous material is in fluid communication with the first porous material and has a first surface with an area substantially the same as an area of the first surface of the first porous material. The first surface of the second porous material is substantially in contact with the first surface of the first porous material. The second porous material has a pore density that is dissimilar the first pore density of the first material. The first material and the second material are configured to provide vapor from a liquid to a fluid-based particle counter. Other apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

Seed sensors that surround the conventional mounting location on existing seed tubes. The seed sensors sense seeds using electromagnetic fields, including RF and microwave fields. In one embodiment, a first seed sensor has a coaxial Fabry-Perot resonant cavity which is formed between two coaxial portions of a conduit that surround the seed tube. Another seed sensor uses a capacitive design. In one embodiment, the driving signals are applied 180 degrees out of phase. The detected phase shift between the reference and reflected signals provides reliable seed counting. Electronics extract the signal from the sensing field.

Classes IPC  ?

• G01N 22/00 - Recherche ou analyse des matériaux par l'utilisation de micro-ondes ou d'ondes radio, c. à d. d'ondes électromagnétiques d'une longueur d'onde d'un millimètre ou plus
• G01N 27/22 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la capacité
• G01N 15/10 - Recherche de particules individuelles
• A01C 7/10 - Dispositifs de réglage de la caisse à semences

Abrégé

There is disclosed a field calibratable particle sensor solution in a low-cost, very compact form factor. This makes a low-cost sensor more accurate for low-concentration pollution measurements and decreases the cost of pollution measurement systems having a wide geographic coverage. In a related embodiment, the invention illustrates a method and system to remotely and automatically calibrate one or more of the low cost sensors disclosed herein as well as other commercially available sensors (such as optical particle counters, photometers etc.) against a reference instrument (such as a beta attenuation monitor) which may or may not be physically located in the same place as the individual sensors. The method may require minimum (or no) user interaction and the calibration period is adjustable periodically.

Classes IPC  ?

• G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

Various embodiments include methods and apparatuses to reduce false-particle counts in a water-based condensation particle counter (CPC). In one embodiment, a cleanroom CPC has three parallel growth tube assemblies. A detector is coupled to an outlet of each of the three parallel growth tube assemblies, and is used to compare the particle concentrations measured from each of the three growth tube assemblies. An algorithm compares the counts from the three detectors and determines when the particles counted are real and when they are false counts. Any real particle event shows up in all three detectors, while false counts will only be detected by one detector. Statistics are used to determine at which particle count levels the measured counts are considered to be real versus false. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/10 - Recherche de particules individuelles

Abrégé

A microwave moisture sensor for agricultural materials, such as grains and nuts, is disclosed herein that includes a material sample holder having a substantially cylindrical cavity formed therein. The meter assembly further includes a transmitting antenna on a side of the sample holder and a receiving antenna on a side of sample holder directly opposite the transmitting antenna wherein the sample holder is located between the two antennas, the receiving antenna configured to receive a transmitted microwave through the sample holder.

Classes IPC  ?

• G01N 22/04 - Recherche de la teneur en eau
• G01N 24/08 - Recherche ou analyse des matériaux par l'utilisation de la résonance magnétique nucléaire, de la résonance paramagnétique électronique ou d'autres effets de spin en utilisant la résonance magnétique nucléaire
• G01N 22/00 - Recherche ou analyse des matériaux par l'utilisation de micro-ondes ou d'ondes radio, c. à d. d'ondes électromagnétiques d'une longueur d'onde d'un millimètre ou plus
• G01N 24/00 - Recherche ou analyse des matériaux par l'utilisation de la résonance magnétique nucléaire, de la résonance paramagnétique électronique ou d'autres effets de spin

Produits et services

Software, recorded, for use with associated electronic test instruments, for leak, flow and functional testing in respirator masks

Produits et services

Electronic test instrument and associated software for use in leak, flow and functional testing

Abrégé

A LIBS measurement system is described herein that provides an orifice, aperture or opening in a substantially V-shaped chute or sleeve that allows access to the material to be analyzed from the underside of the chute. The laser beam is aimed through the hole and return light (signal) is collected through the hole by a photodetector assembly. A diverter device, which is located at an output end of the chute, diverts certain particles away from the chute upon receipt of an actuation signal.

Classes IPC  ?

• B07C 5/00 - Tri selon une caractéristique ou une particularité des objets ou du matériau à trier, p.ex. tri commandé par un dispositif qui détecte ou mesure cette caractéristique ou particularité; Tri à l'aide de dispositifs manœuvrés à la main, p.ex. d'aiguillages
• G01N 21/71 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité thermiquement
• B07C 5/342 - Tri en fonction d'autres propriétés particulières selon les propriétés optiques, p.ex. la couleur
• B07C 5/36 - Appareils trieurs caractérisés par les moyens qu'ils utilisent en vue de la distribution
• G01J 3/443 - Spectrométrie par émission

Abrégé

The respirator fit monitor described herein can be worn continuously by users so as to provide an indication as to how well their masks are fitting during use, thereby providing quantitative, wearable fit testers available for continuous use in real-life situations. The monitor includes a low-cost optical particle sensor assembly and controller unit for performing mask fit tests by comparing particle concentrations inside and outside of the mask. The fit test monitor is low cost and wearable, capable of dual sampling, capable of fit factor ratios well above 100, is battery powered and provides near real time measurements with a means for indicating the fit of the mask. The system includes wired or wireless communications for data logging, analysis and display capabilities.

Classes IPC  ?

• A62B 9/00 - DISPOSITIFS, APPAREILS OU PROCÉDÉS DE SAUVETAGE - Parties constitutives des appareils respiratoires
• A62B 27/00 - Méthodes ou dispositifs pour tester des appareils respiratoires
• G01M 3/38 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation de la lumière

Abrégé

The respirator fit monitor described herein can be worn continuously by users so as to provide an indication as to how well their masks are fitting during use, thereby providing quantitative, wearable fit testers available for continuous use in real-life situations. The monitor includes a low-cost optical particle sensor assembly and controller unit for performing mask fit tests by comparing particle concentrations inside and outside of the mask. The fit test monitor is low cost and wearable, capable of dual sampling, capable of fit factor ratios well above 100, is battery powered and provides near real time measurements with a means for indicating the fit of the mask. The system includes wired or wireless communications for data logging, analysis and display capabilities.

Classes IPC  ?

• A62B 9/00 - DISPOSITIFS, APPAREILS OU PROCÉDÉS DE SAUVETAGE - Parties constitutives des appareils respiratoires
• A62B 27/00 - Méthodes ou dispositifs pour tester des appareils respiratoires
• G01M 3/38 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation de la lumière

Abrégé

Seed sensors that surround the conventional mounting location on existing seed tubes. The seed sensors sense seeds using electromagnetic fields, including RF and microwave fields. In one embodiment, a first seed sensor has a coaxial Fabry-Perot resonant cavity which is formed between two coaxial portions of a conduit that surround the seed tube. Another seed sensor uses a capacitive design. In one embodiment, the driving signals are applied 180 degrees out of phase. The detected phase shift between the reference and reflected signals provides reliable seed counting. Electronics extract the signal from the sensing field.

Classes IPC  ?

• G01N 22/00 - Recherche ou analyse des matériaux par l'utilisation de micro-ondes ou d'ondes radio, c. à d. d'ondes électromagnétiques d'une longueur d'onde d'un millimètre ou plus
• G01N 27/22 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la capacité

Abrégé

In one example embodiment, a seed sensor is disclosed adapted to fit a conventional mounting location in existing seed tubes that provides improved performance by providing a wide light source (more LEDS), a wide photodetector and a current profiling scheme for the LEDs that provides more light at the opposite ends of the LED array. A result of such an arrangement is to improve seed resolution and to reduce seed spatial variability within the seed tube.

Classes IPC  ?

• A01C 7/10 - Dispositifs de réglage de la caisse à semences
• A01C 7/20 - Eléments de semoirs pour guider et déposer les graines
• G01B 11/14 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la distance ou la marge entre des objets ou des ouvertures espacés

Abrégé

Various embodiments include methods of reducing false-particle counts in a water-based condensation particle counter (CPC). One embodiment of a method includes delivering water into one or more wicks, sensing an excess volume of water delivered to the wicks, collecting the excess volume of water into a collection reservoir, and draining the excess volume of water from the collection reservoir. Other methods and apparatuses are disclosed.

Classes IPC  ?

• G01N 15/10 - Recherche de particules individuelles
• G01N 21/85 - Analyse des fluides ou solides granulés en mouvement
• G01N 7/10 - Analyse des matériaux en mesurant la pression ou le volume d'un gaz ou d'une vapeur en permettant la diffusion des constituants à travers une cloison poreuse et en mesurant une différence de pression ou de volume

Abrégé

There is disclosed a handheld air flow velocity measurement probe that includes a bridge circuit assembly having an airflow velocity sensor that is a resistance temperature detector (RTD) and a digitally controlled resistive element to dynamically adjust and maintain the resistance of the velocity sensor within the overheat temperature predefined range. The velocity measurement also uses a separate temperature sensor to sense the temperature of the air or gas flow. A humidity sensor is also included remote from the other sensors to measure humidity in the gas flow to be measured. All of the above described components are housed at a probe tip instead of a base as in most standard handheld probes and the digital interface at the probe tip allows the user to replace a bulky, expensive telescoping antenna with stackable extender scheme.

Classes IPC  ?

• G01K 13/02 - Thermomètres spécialement adaptés à des fins spécifiques pour mesurer la température de fluides en mouvement ou de matériaux granulaires capables de s'écouler
• G01P 5/12 - Mesure de la vitesse des fluides, p.ex. d'un courant atmosphérique; Mesure de la vitesse de corps, p.ex. navires, aéronefs, par rapport à des fluides en mesurant des variables thermiques en utilisant la variation de la résistance d'un conducteur chauffé

Abrégé

A system and a method of measuring a particle's size in a select aerosol using the optical diameter of the particle to perform a mobility and/or aerodynamic diameter conversion without any knowledge about the particle's shape and its optical properties in the aerosol being characterized. In one example embodiment of the invention, the method includes generating a set of calibration data and finding the optimal refractive index and shape that best fits the calibration data. In addition, the method includes creating a new calibration curve that provides a mobility-equivalent or aerodynamic-equivalent diameter.

Classes IPC  ?

• G01N 21/00 - Recherche ou analyse des matériaux par l'utilisation de moyens optiques, c. à d. en utilisant des ondes submillimétriques, de la lumière infrarouge, visible ou ultraviolette
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 15/10 - Recherche de particules individuelles

Produits et services

ventilation test instrument for the measurement of air velocity, temperature, humidity, and differential pressure

Abrégé

A laser-based spectroscopy system that combines a distance/proximity standoff sensor, a high-repetition rate laser spectroscopy system, and software with a decision-making algorithm embedded in a processing unit which in combination performs selective firing of the laser when the target object is within an interrogation zone. In a related embodiment, the system provides selective sorting of spectroscopic signals based on information from the standoff signal and from information contained in the spectral signals themselves. The laser emission can be actively controlled while keeping the laser firing, thereby preserving the thermal stability and hence the power of the laser; and the standoff sensor information and the spectral information can be combined to determine the proper relative weighting or importance of each piece of spectral information.

Classes IPC  ?

• G01N 21/00 - Recherche ou analyse des matériaux par l'utilisation de moyens optiques, c. à d. en utilisant des ondes submillimétriques, de la lumière infrarouge, visible ou ultraviolette
• G01J 3/02 - Spectrométrie; Spectrophotométrie; Monochromateurs; Mesure de la couleur - Parties constitutives
• B07C 5/342 - Tri en fonction d'autres propriétés particulières selon les propriétés optiques, p.ex. la couleur
• G01J 3/443 - Spectrométrie par émission
• G01N 21/71 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité thermiquement
• G01D 5/26 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensible; Moyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminé; Transducteurs non spécialement adaptés à une variable particulière utilisant des moyens optiques, c. à d. utilisant de la lumière infrarouge, visible ou ultraviolette
• G01D 5/48 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensible; Moyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminé; Transducteurs non spécialement adaptés à une variable particulière utilisant des moyens à base de radiation d'ondes ou de particules
• G01J 3/12 - Production du spectre; Monochromateurs

Abrégé

There is disclosed a field calibratable particle sensor solution in a low-cost, very compact form factor. This makes a low-cost sensor more accurate for low-concentration pollution measurements and decreases the cost of pollution measurement systems having a wide geographic coverage. In a related embodiment, the invention illustrates a method and system to remotely and automatically calibrate one or more of the low cost sensors disclosed herein as well as other commercially available sensors (such as optical particle counters, photometers etc.) against a reference instrument (such as a beta attenuation monitor) which may or may not be physically located in the same place as the individual sensors. The method may require minimum (or no) user interaction and the calibration period is adjustable periodically.

Classes IPC  ?

• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

The electrospray generator system described herein uses a soft X-ray source instead of a radioactive source to generate bipolar ions for the neutralization of the initially charged particles. In one example, the soft X-ray source is directed at an orifice from which the charged particles emanate, thereby allowing the neutralization of the particles to happen faster than in prior art configurations and, in some instances, even neutralization occurring immediately on a droplet before it passes through the electrospray orifice.

Classes IPC  ?

• B05B 5/00 - Pulvérisation électrostatique; Dispositifs de pulvérisation comportant des moyens pour charger électriquement le pulvérisat; Pulvérisation de liquides ou d'autres matériaux fluides par voies électriques
• B05B 5/03 - Appareillages pour délivrer le matériau, p.ex. pistolets de pulvérisation électrostatique caractérisés par l'utilisation de gaz

Abrégé

2, down to parts per trillion-levels, which are levels that are too low to be detectable by currently available commercial gas sensors.

Classes IPC  ?

• G01N 15/08 - Recherche de la perméabilité, du volume des pores ou de l'aire superficielle des matériaux poreux
• G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
• B01D 53/04 - SÉPARATION Épuration chimique ou biologique des gaz résiduaires, p.ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par adsorption, p.ex. chromatographie préparatoire en phase gazeuse avec adsorbants fixes

Abrégé

A LIBS measurement system is described herein that provides an orifice, aperture or opening in a substantially V-shaped chute or sleeve that allows access to the material to be analyzed from the underside of the chute. The laser beam is aimed through the hole and return light (signal) is collected through the hole by a photodetector assembly. A diverter device, which is located at an output end of the chute, diverts certain particles away from the chute upon receipt of an actuation signal.

Classes IPC  ?

• G01N 21/71 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité thermiquement
• B07C 5/342 - Tri en fonction d'autres propriétés particulières selon les propriétés optiques, p.ex. la couleur
• G01J 3/443 - Spectrométrie par émission

Abrégé

A saturator block assembly that is adapted for use with a condensation particle counter is described. The saturator block assembly is comprised of a member that is at least partially formed from a porous material that is adapted to absorb a working fluid. The saturator block assembly also includes at least one open column formed through the porous member. The open column is parallel with a length of the member and is adapted to emit the working fluid in vapor form from the porous material. The saturator block assembly is further comprised of an outer surface, and is adapted to operate at low pressure or low pressure transient applications. A volume of the porous material is configured so as to reduce the amount of air capable of being trapped in the pores of the porous material during low pressure or low pressure transient applications.

Classes IPC  ?

• G01N 1/10 - Dispositifs pour prélever des échantillons à l'état liquide ou fluide
• G01N 1/40 - Concentration des échantillons
• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

A novel device, method and systems disclosed managing the thermal challenges of LIBS laser components and a spectrometer in a handheld structure as well the use of simplified light signal collection which includes a bare fiber optic to collect the emitted light in close proximity to (or in contact with) the test material. In one example embodiment of the handheld LIBS device, a burst pulse frequency is 4 kHz is used resulting in a time between pulses of about 250µs which is a factor of 10 above that of other devices in the prior art. In a related embodiment, an active Q-switched laser module is used along with a compact spectrometer module using a transmission grating to improve LIBS measurement while substantially reducing the size of the handheld analyzer.

Classes IPC  ?

• G01N 21/71 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité thermiquement

Abrégé

A novel device, method and systems disclosed managing the thermal challenges of LIBS laser components and a spectrometer in a handheld structure as well the use of simplified light signal collection which includes a bare fiber optic to collect the emitted light in close proximity to (or in contact with) the test material. In one example embodiment of the handheld LIBS device, a burst pulse frequency is 4 kHz is used resulting in a time between pulses of about 250 μs which is a factor of 10 above that of other devices in the prior art. In a related embodiment, an active Q-switched laser module is used along with a compact spectrometer module using a transmission grating to improve LIBS measurement while substantially reducing the size of the handheld analyzer.

Classes IPC  ?

• G01N 21/71 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité thermiquement
• G01J 3/443 - Spectrométrie par émission
• G01J 3/02 - Spectrométrie; Spectrophotométrie; Monochromateurs; Mesure de la couleur - Parties constitutives
• G01J 3/18 - Production du spectre; Monochromateurs en utilisant des éléments diffractants, p.ex. réseaux

Abrégé

A laser-based spectroscopy system that combines a distance/proximity standoff sensor, a high-repetition rate laser spectroscopy system, and software with a decision-making algorithm embedded in a processing unit which in combination performs selective firing of the laser when the target object is within an interrogation zone. In a related embodiment, the system provides selective sorting of spectroscopic signals based on information from the standoff signal and from information contained in the spectral signals themselves. The laser emission can be actively controlled while keeping the laser firing, thereby preserving the thermal stability and hence the power of the laser; and the standoff sensor information and the spectral information can be combined to determine the proper relative weighting or importance of each piece of spectral information.

Classes IPC  ?

• G01J 1/42 - Photométrie, p.ex. posemètres photographiques en utilisant des détecteurs électriques de radiations
• B07C 5/342 - Tri en fonction d'autres propriétés particulières selon les propriétés optiques, p.ex. la couleur
• G01J 3/02 - Spectrométrie; Spectrophotométrie; Monochromateurs; Mesure de la couleur - Parties constitutives
• G01N 21/71 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité thermiquement
• G01J 3/443 - Spectrométrie par émission

Abrégé

An apparatus and method for improving aerosol particle characterization and detection accuracy in clean room applications that includes an optical particle sizer that receives a particle containing aerosol sample at a higher flow rate which is operatively coupled to an inertial aerosol concentrator for concentrating particles received from the optical particle sizer and delivering a lower flow rate, particle enriched output. The system further includes an optical sensor for sensing of intrinsic particle fluorescence of the lower, particle-enriched flow, since intrinsic fluorescence is a useful indicator of biological particles and biological particle viability, including bacterial particles. The system as a whole provides a measure derived from a single inlet flow both of total particles and of viable microbial particles based on their spectroscopic properties.

Classes IPC  ?

• G01N 21/53 - Dispersion, c. à d. réflexion diffuse dans un corps ou dans un fluide dans un courant de fluide, p.ex. dans la fumée
• G01N 21/27 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en utilisant la détection photo-électrique
• G01N 21/64 - Fluorescence; Phosphorescence
• G01N 21/65 - Diffusion de Raman
• G01N 21/94 - Recherche de souillures, p.ex. de poussières
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 21/3504 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p.ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge pour l'analyse des gaz, p.ex. analyse de mélanges de gaz
• G01N 21/35 - Couleur; Propriétés spectrales, c. à d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p.ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge
• G01N 21/67 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité électriquement, p.ex. par électroluminescence en utilisant des arcs électriques ou des décharges électriques
• G01N 21/71 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité thermiquement
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

An improved nanoparticle sizing apparatus comprised of a unipolar charger operatively coupled to a radial differential mobility analyzer in combination with a condensation particle counter and powered by a power source such as a battery or solar cell, thereby providing a portable sizing device.

Classes IPC  ?

• H01J 49/24 - Systèmes à vide, p.ex. maintenant des pressions voulues
• G01N 27/62 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant les décharges électriques, p.ex. l'émission cathodique
• G01N 15/10 - Recherche de particules individuelles
• H01J 49/22 - Déflexion électrostatique
• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux

Abrégé

The various embodiments described herein significantly increase charge probabilities of nanoparticles by first growing them to larger droplets using a diethylene glycol-based preconditioner, neutralizing the droplets with a bipolar charger, and then removing the condensed liquid to recover the original aerosol particles. The small droplet size is an important element in reducing the amount of aerosol particles with more than one charge. The high single-charge particle probability significantly enhances the monodisperse aerosol throughput of a DMA, while the reduced multiple charge probabilities ensure high monodispersity of DMA-classified aerosols and good data quality of SMPS measurements.

Classes IPC  ?

• G01N 15/06 - Recherche de la concentration des suspensions de particules
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• B05B 5/03 - Appareillages pour délivrer le matériau, p.ex. pistolets de pulvérisation électrostatique caractérisés par l'utilisation de gaz
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux

Abrégé

A system and a method of measuring a particle's size in a select aerosol using the optical diameter of the particle to perform a mobility and/or aerodynamic diameter conversion without any knowledge about the particle's shape and its optical properties in the aerosol being characterized. In one example embodiment of the invention, the method includes generating a set of calibration data and finding the optimal refractive index and shape that best fits the calibration data. In addition, the method includes creating a new calibration curve that provides a mobility-equivalent or aerodynamic-equivalent diameter.

Classes IPC  ?

• G01N 21/00 - Recherche ou analyse des matériaux par l'utilisation de moyens optiques, c. à d. en utilisant des ondes submillimétriques, de la lumière infrarouge, visible ou ultraviolette
• G01N 15/02 - Recherche de la dimension ou de la distribution des dimensions des particules
• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 15/14 - Recherche par des moyens électro-optiques
• G01N 15/10 - Recherche de particules individuelles

Abrégé

A head form for testing a variety of respirators. The head form can prevent false leak failures by having a mask registration member upon which the mask under test is mounted, the mask registration member being self lubricating. In one embodiment, the registration member is an inflatable bladder. The bladder can be configured to limit lift away of the inflatable bladder from the recess, thereby mitigating leaks in the head form assembly. The bladder may be configured to limit roll away of portions of the bladder that register against the head form, thereby reducing or eliminating leaks between the inflatable bladder and the mask under test.

Classes IPC  ?

• G09B 23/00 - Modèles à usage scientifique, médical ou mathématique, p.ex. dispositif en vraie grandeur pour la démonstration
• G01M 3/02 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide

Abrégé

A system and a method is described herein for the collection of small particles in a concentrated manner, whereby particles are deposited onto a solid surface or collected into a volume of liquid. The collected samples readily interface to any of a number of different elemental, chemical, or biological or other analysis techniques.

Classes IPC  ?

• G01N 15/00 - Recherche de caractéristiques de particules; Recherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
• G01N 1/22 - Dispositifs pour prélever des échantillons à l'état gazeux
• G01N 15/06 - Recherche de la concentration des suspensions de particules

Abrégé

There is disclosed a system and apparatus for connecting remote and environmental sensors and other operating systems to a portable computing and communications device. The portable device configured to receive and process a set of data and transmit a response or message to at least the user on the quality of the data received. The portable device adapted to reconfigure the remote sensors or operating systems to produce a new set of data.

Classes IPC  ?

• G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
• F24F 11/00 - Aménagements de commande ou de sécurité
• G01L 19/08 - Moyens pour l'indication ou l'enregistrement, p.ex. pour l'indication à distance
• G01D 1/18 - Dispositions pour la mesure donnant des résultats autres que la valeur instantanée d'une variable, d'application générale avec dispositions pour signaler le dépassement d'une valeur prédéterminée d'un paramètre non spécifié
• G01D 21/00 - Mesures ou tests non prévus ailleurs
• F24F 3/16 - Systèmes de conditionnement d'air dans lesquels l'air conditionné primaire est fourni par une ou plusieurs stations centrales aux blocs de distribution situés dans les pièces ou enceintes, blocs dans lesquels il peut subir un traitement secondaire; Appareillage spécialement conçu pour de tels systèmes caractérisés par le traitement de l'air autrement que par chauffage et refroidissement par ozonisation