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5551282 |
Method and apparatus for measuring volume correction using molar quantities
A method and apparatus for measuring volume correction in a gas pipeline using a variable volume chamber where the gas is sampled at the temperature and pressure of gas in the pipeline. A portion...
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5542284 |
Method and instrument for measuring differential oxygen concentration between two flowing gas streams
An apparatus and method for measuring differential oxygen concentration between two flowing gas streams is described. A reference gas and a sample gas in separate gas flow paths are passed, at...
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5531096 |
Gas analyzer and method for analyzing a gas
A method for gas analysis includes the steps of extracting a gas sample from a gas to be analyzed with respect to one or more of its gas components, measuring the flow of the extracted gas sample,...
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5526675 |
Method and apparatus for measuring evaporative emissions in a fixed-volume enclosure
Provided is a method and apparatus for measuring evaporative vehicle emissions in a fixed-volume enclosure. The method comprises the steps of providing a volume compensation means in fluid...
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5526280 |
Method and system for gas detection
A system and method for using a gas detecting device that conducts electricity increasingly for increasing concentration of a gas being detected. The temperature of a gas sensor element is...
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5522253 |
Smelling aid device
The present invention is directed to a smelling aid device including a nose member of a configuration to be at least partially insertable into a nostril and having a passageway therethrough, and...
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5520209 |
Fluid relief device
The present invention discloses a fluid relief device for relieving pressure of a fluid stored in a container or tank, or fluid used in a piece of equipment. In one aspect such a device has a body...
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5517237 |
Video photometric color system for processing color specific streams
A video photometric color sensing system is provided for characterizing the color of a homogeneous substance on a real time basis. The sensing system includes a sample port for holding a...
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5507325 |
Vapor recovery system for fuel dispensers
A dispenser for volatile liquids with a vapor collection system is disclosed which controls the rate of operation of a vacuum pump 118 so that a simple vacuum intake 148 disposed preferably inside,...
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5507173 |
Gas analyzer utilizing cancellation of parallel microwave beams
A method for analyzing a gaseous mixture by means of microwave absorption including the steps of: generating microwave energy of at least one frequency known to be absorbed by the component of...
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5503000 |
Method for determining small quantities of carbon monoxide and nitrogen oxides in gaseous mixtures
The invention relates to a method for determining small quantities of carbon monoxide and nitrogen oxides in gaseous mixtures containing oxygen with the aid of a sensor whose electrical resistance...
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5499528 |
Apparatus for measuring hot gas content
A gas monitoring apparatus with a heatable hose assembly having a central polymer tube of polyether ether ketone wrapped with a layer of polymer tape is described which is used to provide hot gases...
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5497651 |
Method and apparatus for automatic selection of containers
A method and a system for analyzing gas samples employ at least two semiconductor sensor sets, used alternately. The sensor output signals are time-differentiated. As a result of these features,...
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5496733 |
Discharge monitoring system
A method and system for monitoring a concentration of volatile organic constituents in a test sample. A sparging vessel separates a volatile organic constituent sample from the test sample. A dryer...
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5495747 |
Device for detecting gases for use in diffusion and forced flow modes
A gas detection device is provided comprising an exterior housing in which an active pelement and a compensating pelement are disposed. The gas detection device further comprises a porous frit...
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5485144 |
Compensated ionization sensor
A compensated ionization-type sensor includes spaced apart active and reference electrodes. A center electrode is disposed between the active reference electrodes. A compensating electrode is...
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5482679 |
Device for determining the Wobbe index of a gas mixture
Device for determining the Wobbe index of a first gas mixture, including a Wobbe index meter having a mixing chamber, and a feed system for supplying a first gas mixture and an oxidation gas to the...
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5481476 |
Apparatus for interactive self-modeling mixture analysis
An apparatus for analyzing spectral data of a mixture having a plurality of components by determining the pure variables, each of which has a contribution from only one of the mixture components,...
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5478452 |
In situ isolation of volatile organic compounds from groundwater
Methods and apparatus for in sire isolation of volatile organic compounds from groundwater using electrolytically-generated purge gas are disclosed. One preferred method includes electrolytically...
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5478528 |
Metal oxide catalyst
A catalyst composed of metal oxide particles among which are uniformly incorporated, in order to reduce the operating temperature of the catalyst, palladium particles.
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5467637 |
Method of measuring gas purity information, chamber unit and exposure unit using the method and a device production method
The sonic velocity in a chamber which is filled with helium is measured by using ultrasonic waves, and the temperature in the chamber is also measured. Purity information relating to helium gas...
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5469369 |
Smart sensor system and method using a surface acoustic wave vapor sensor array and pattern recognition for selective trace organic vapor detection
A method and a system using that method are provided which employ a pattern ecognition algorithm to improve sensitivity in detecting hazardous vapors. The algorithm enables the discrimination of...
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5465606 |
System for measuring the efficiency of hydrocarbon vapor recovery installations used in gas stations
The efficiency of hydrocarbon vapor recovery installations used in gas stations is measured. A system for measuring a yield of recovery for hydrocarbon vapors emitted from the tank of a vehicle as...
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5449294 |
Multiple valve assembly and process
A multiple valve assembly incorporates three valves in one valve body. The main body has inlet and outlet ports in the mainline, and two sample ports, one on either side of the main valve seat. The...
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5425264 |
Plastic high vacuum piping components
A method for making vacuum components from plastic material, and in particular, PVC and CPVC, where the plastic component is exposed to a high vacuum or ultra high vacuum for an extended period of...
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5417204 |
Scuba air contamination detector
An air contamination detector for a scuba unit includes a transparent tube having a lumen, the lumen being user visible for a full 360° about its circumference. A contamination indicator is...
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5415025 |
Mass spectrometer-based continuous emissions monitoring system for hazardous waste stack gas measurements
Disclosed is a continuous emissions monitoring system for exhaust gas emissions containing HCl comprising a sampling subsystem with a sample probe in the effluent to collect effluent samples that...
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5404923 |
Apparatus for automated fueling of a launch vehicle
The apparatus for the automated fueling of a launch vehicle includes a mobile fuel line platform assembly for carrying a fuel line assembly. A gross mechanical actuation mechanism provides gross...
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5402665 |
Monitoring gaseous oxygen concentration
Apparatus for monitoring gaseous oxygen concentration that includes an oxygen sensor for providing an electrical sensor signal that varies as a function of oxygen concentration at the sensor....
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5400642 |
Procedure and apparatus for programmed thermal desorption
Method and apparatus for thermal desorption wherein a carrier liquid is circulated around a desorption chamber when a sample to be desorbed in heated, whereby the desorbed substance is dissolved...
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5395589 |
Apparatus for rapid and specific detection of organic vapors
Apparatus for preconcentrating trace amounts of organic vapors in a sample of air for subsequent detection, comprising a metallic substrate; a thin film of fullerenes deposited on the metallic...
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5377528 |
Measuring device for measuring parameters in an air stream to be introduced into the cabin of a motor vehicle
Air to be introduced into the cabin of a motor vehicle passes over a measuring device, in which parameters such as temperature, humidity and pollution are measured. The measuring device comprises a...
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5373724 |
Method of sensing a gas concentration
A resealable gas concentration sensor for determining the concentration of a particular gas within a gaseous environment. The sensor is constructed of a housing and a cap. The cap is adapted to be...
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5365216 |
Catalyst monitoring using ego sensors
A method of monitoring, while on board an automotive vehicle, one or more of catalyst performance, engine misfire, and combustion quality, the vehicle having an internal combustion engine equipped...
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5355739 |
Apparatus for measuring gas emission rate from soil
Gas flux rate from a surface is measured using an elongated tubular housing having a lower open end and an upper open end with a support positioned within the housing a predetermined distance from...
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5348884 |
Device and method for the detection of microorganisms which produce low-molecular-weight metabolites
Selective detection of microorganisms is achieved by a screening technique in which radioactively labeled, low-molecular-weight metabolites produced by microorganisms to be detected reach an...
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5330719 |
Automotive oxygen sensor for use in an industrial process analyzer
An industrial process oxygen analyzer, and method of using same, incorporates an automotive oxygen sensor to minimize the criticalness of controlling heater temperature during operation. Higher...
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5325708 |
Detector for helium leaks
The present invention relates to an improved helium detecting unit particularly adapted to be used under difficult conditions and in places without power supply sources, which comprises an...
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5325705 |
In-line detector system for real-time determination of impurity concentration in a flowing gas stream
An in-line detector system for real-time detection of impurity concentration in a flowing gas stream. In a specific aspect, the system may comprise a purifier unit for selective purification of gas...
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5321971 |
Gas diffusion control assembly
A gas diffusion control assembly comprises a gas inlet; a restriction to the rate of flow of gas or vapor from the gas inlet in the form of a porous diffusion barrier extending across the gas...
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5321972 |
Method for quantitatively determining a component of a gas flow and apparatus therefor
The invention relates to a method for quantitatively determining a gas component of a gas flow and an apparatus therefor. The apparatus includes a testing conduit having a throttle through which...
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5318752 |
Method and apparatus for sampling a reactive atmosphere into a vacuum chamber of an analyzer
A method and apparatus for transferring a reaction gas between a high pressure environment and a low pressure environment. A baffle channel is disposed in a fluid communication path between the...
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5315885 |
Sample dispersing apparatus and method
An apparatus and method for dispersing a sample in a process stream is disclosed. The apparatus comprises a conduit which receives a sample at a first end and passes the sample to a pyrolysis...
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5313819 |
Quantification of blast furnace slag in a slurry
A method to determine the amount of blast furnace slag in a slurry sample. The slurry is preferably a drilling fluid or a wellbore cement slurry. The method comprises correlating the amount of...
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5301536 |
Apparatus for obtaining on-line gas samples for the measurement of crude oil content
The present invention is drawn to a method for measuring crude oil contained in a gas flowing in a gas line which incorporates the steps of obtaining a sample of gas from the gas line, passing the...
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H001293 |
Contact hazard monitor
A surface contaminated with toxic materials to be tested or monitored is pled using a probe which is shown here to have a rectangular opening typically of several square inches in cross section. A...
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5289717 |
Air-fuel ratio detecting device
An air fuel ratio detecting device has an air-fuel ratio sensor for producing an air-fuel ratio information indicative of the concentration of oxygen in an exhaust gas produced by a burned air-fuel...
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5287725 |
Surface volatile material detector
Surface Volatile Material Detector including a vacuum chamber that is adapted to hold a silicon wafer for testing. The surface of the wafer is exposed to a heat source which evaporates the volatile...
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5285675 |
Acoustic fluid flow monitoring
A method of measuring the flow and composition of a fluid or mixture of fluids through a system by determining the temperature, pressure and speed of sound in the fluid or mixture of fluids in the...
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5279795 |
Extended range chemical sensing apparatus
An apparatus for sensing chemicals over extended range of concentrations. In particular, first and second sensors each having separate, but overlapping ranges for sensing concentrations of hydrogen...
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