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7385161 |
Method of estimating the temperature of an oxygen sensor heating element
The resistance of an oxygen sensor heating element is estimated by modeling the effects of physical and electrical heating on the resistance of the heating element lead-in conductors, and...
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7373838 |
Acoustic wave flow sensor for high-condensation applications
An acoustic wave flow sensor includes a piezoelectric substrate and a heater located immediately below the acoustic wave substrate. A heating element can be deposited in association with a...
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7367216 |
Phased micro analyzer V, VI
A micro fluid analyzer having a concentrator and two or more separators. The analyzer may have one, two or more pumps. The analyzer may have a hyper pre-concentrator having a number of channels....
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7357015 |
Gas concentration sensor, hydrogen purification unit using this and fuel cell system
In order to provide a step capable of reliably detecting a CO concentration in a reformed gas at low cost and a hydrogen purifier capable of fully exerting a function of a CO purifying catalyst, a...
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7174768 |
Hydrogen sensor, apparatus for measuring hydrogen concentration, and method for measuring hydrogen concentration
A hydrogen sensor includes a hydrogen-absorbing material, a thermoelectric element, an electrical circuit for driving the thermoelectric element, a thermometer for the hydrogen-absorbing material,...
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7140232 |
Method and apparatus for multiple gas sensor
A method and apparatus includes filter for removing a non-tracer gas from detection system and control unit for detecting the presence a low concentration tracer gas in the atmosphere.
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7104112 |
Phased micro analyzer IV
A fluid analyzer having a concentrator and separator for concentrating and separating fluid samples at pressures up to about 10,000 psi (˜700 bar). The concentrator and separator may consist of a...
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7096717 |
Control device of gas sensor
When the ignition switch of a vehicle is turned OFF, a purging process for increasing the flow of an off-gas fluidizing in each of the outlet side pipings of a fuel cell and discharging water...
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7080545 |
Apparatus and process for sensing fluoro species in semiconductor processing systems
A gas detector and process for detecting a fluorine-containing species in a gas containing same, e.g., an effluent of a semiconductor processing tool undergoing etch cleaning with HF, NF 3 , etc....
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7069768 |
Method and apparatus for eliminating and compensating thermal transients in gas analyzer
The invention concerns a gas analyzer comprising: a measuring volume ( 2 ), a radiation source ( 1 ) for providing a beam to pass said measuring volume; a heat sink ( 16 ) for said radiation...
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7000452 |
Phased micro fluid analyzer
A micro fluid analyzer having a concentrator and separator. A strip continuous through a channel in the concentrator may provide a hot zone that may move with the flow of fluid through the channel...
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6997037 |
Determination of effective composition of a mixture of hydrocarbon gases
A method and apparatus for determining the effective composition of a mixture of gases including a plurality of hydrocarbon gases, the method comprising selecting one or more effective hydrocarbons...
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6952947 |
Measuring head for a device for measuring the concentration of a paramagnetic gas
A measuring head for the determination of the concentration of a paramagnetic gas in a gas sample has first and second housing parts ( 21, 2 ) made of a steel alloy for accommodating a magnet coil...
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6928858 |
Apparatus and method for thermal conductivity detection in gas chomatography equipment
A thermal conductivity detector includes separate sample gas and reference gas chambers. Each chamber has a gas inlet and a gas outlet and a sensor. The chambers are connected by at least one...
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6895802 |
Measuring gas cell for a device for measuring the concentration of a paramagnetic gas
A highly compact measuring gas cell for a device for measuring the concentration of a paramagnetic gas on the basis of the change in the thermal conductivity of the paramagnetic gas, which is...
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6849238 |
Measuring sensor for gases
The measuring sensor, particularly a lambda probe, has a ceramic sensor member retained at a high temperature during measuring operation. It is shielded from water droplets, carried along in the...
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6843102 |
Gas sensor arrangement
A gas sensor configuration comprises a radiation-emitting radiation device, a gas measuring chamber, a detector unit and an evaluation device. A measuring gas that contains at least one gas...
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6805839 |
Response microcantilever thermal detector
A “folded leg” thermal detector microcantilever constructed of a substrate with at least one leg interposed between a fixed end and a deflective end, each leg having at least three essentially...
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6792794 |
Low power gas leak detector
A leak detector having a multi-stage concentrator, consisting of an array of heater elements which desorb analytes in a phased manner, in synch with the sample stream, to maximize sensitivity. The...
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6739178 |
Sensor probe for measuring temperature and liquid volumetric fraction of a liquid droplet laden hot gas and method of using same
A sensor probe and method of use for determining the temperature, velocity, and/or liquid volumetric fraction of gas laden with droplets. In one variation, the probe includes a single heating...
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6694800 |
Gas analyzer using thermal detectors
The invention relates to a gas analyzer comprising a measuring volume ( 6 ) for a sample gas mixture (G), a radiation source ( 1 ) for providing a beam ( 20 ) of electromagnetic radiation to pass...
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6688159 |
Method and device for determining the gas concentrations in a gas mixture
The invention is directed to a method of determining gas concentrations in a gas mixture comprising more than one component, in which thermal conductivities of the gas mixture are determined at...
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6659963 |
Apparatus for obtaining temperature and humidity measurements
A probe for obtaining temperature and humidity readings within the oral and nasal cavity. An elongated tube having a wire cage at one of its ends, includes first and second longitudinally...
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6644098 |
Heated electrode refrigerant detector utilizing one or more control loop
A gas detector for sensing the presence of at least one predetermined gas is operative in conjunction with a electrical power source and includes a detection circuit, a temperature controller, and...
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6637255 |
Damped paddle wheel for plasma chamber shock tube
A damping gyrometer comprised of at least two and preferably four rotating paddles attached to a common central elevated low-friction pivot point via rising radial arms. A stand with a concave...
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6622543 |
Gas detection sensor
A gas detection sensor permits precise measurement of the concentration of flammable gas in a detection or subject gas and the concentration of oxygen in a detection gas containing flammable gases....
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6571604 |
Method and device for evaluating during drilling the capacity of well fluids to form hydrates
Method of determining the gas hydrate formation conditions in a well fluid, comprising the following stages: taking a fluid sample, placing this sample in a calorimetry cell, performing on this...
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6550310 |
Catalytic adsorption and oxidation based carbon monoxide sensor and detection method
A high-sensitivity carbon monoxide sensor is shown and described. The sensor includes a sensing element having a catalyst dispersed over a metal oxide layer. The catalyst is capable of adsorbing...
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6476611 |
Circuit and a method for monitoring and diagnosing an oxygen probe
A circuit for monitoring and diagnosing an oxygen probe provided with a sensitive cell connected between a first and a second signal terminal, and a heating member connected between a battery and a...
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6474138 |
Adsorption based carbon monoxide sensor and method
A carbon monoxide sensor and method is shown and described. The sensor includes a sensing element that includes an adsorbent dispersed over a support material. The adsorbent is capable of...
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6455000 |
Method and apparatus for measuring the concentration of a gas
A method and apparatus using thermomechanical means for signalling the concentration of a reactive gas is disclosed. The thermomechanical means uses movement of a mechanical member to produce a...
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6436346 |
Micro-machined calorimetric biosensors
A method and apparatus are provided for detecting and monitoring micro-volumetric enthalpic changes caused by molecular reactions. Micro-machining techniques are used to create very small thermally...
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6433696 |
Carbon monoxide emitting apparatus, carbon monoxide monitor shutoff, and circuit therefor
A system for monitoring carbon monoxide in an environment which includes an apparatus emitting carbon monoxide, such as an internal combustion engine. A carbon monoxide sensor measures a...
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6406181 |
Temperature sensor
A temperature sensor, in particular for a gas sensor, has at least one printed conductor, where a temperature-dependent change in a resistance of the printed conductor is detected and analyzed. The...
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6405578 |
Magnetic oxygen analyzer
A magnetic oxygen analyzer which employes a detector comprising a magnetic pole, heat generator arranged in a non-uniform magnetic field where the intensity of a magnetic field produced by the...
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6346420 |
Method of analyzing a gas mixture to determine its explosibility and system for implementing a method of this kind
In this method of analyzing a gas mixture containing at least one inflammable gas to determine its explosibility, a resistive heating element ( 15 ) is energized in an analysis enclosure ( 12 )...
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6330060 |
Cloud condensation nucleus spectrometer
A cloud condensation nucleus spectrometer having a streamwise segmented condensation nucleus growth column. The condensation nucleus growth column includes alternating hot and cold...
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6324894 |
Device and method for measuring argon impurity by utilizing the triple point and the γ-β transition temperatures of oxygen
The present invention relates to a quantitative measuring method of argon impurity contained in high purity oxygen by means of triple point and γ-β phase transition of oxygen, and also to a...
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6318149 |
Method and device for determining the joule-thomson coefficient of a fluid
The invention is a method for determining the Joule-Thomson coefficient of a fluid, expressing the temperature variation in relation to a pressure variation thereof. The fluid is injected at a...
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6289719 |
Method for operating a gas sensor
A method of operating a gas sensor having two sensor electrodes whose output signal is evaluated in an evaluation circuit connected downstream of the sensor electrodes, the sensor electrodes being...
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6279380 |
Noncombustive method of determining the calorific value of fuel gas
Noncombustive method of measuring the calorific value of fuel gas, wherein a) the speed of sound in the gas is determined under first and under second reference conditions and one of the...
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6276192 |
Gas detecting sensor and device for controlling ventilation systems
There are provided with a gas detecting sensor and a gas detecting device for controlling a ventilation system of a vehicle using the gas detecting sensor. The gas detecting sensor of the present...
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6209387 |
System and method for determining thermodynamic properties
Disclosed is a system and method for determining the thermodynamic properties and percentage of each component of a multi-component gas medium by using speed of sound in conjunction with other...
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6148659 |
Gas concentration monitor having a bridge configured flow system
A gas concentration monitor has a pneumatic bridge having two parallel flowpaths containing a first conduit leg and a second conduit leg connected to an input line. Each leg has an entry orifice...
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6074882 |
Device determining a concentration of a gas mixture
In order to determine a concentration of a gas mixture, especially a hydrogen concentration of a containment atmosphere of a nuclear power station, a temperature change resulting from a catalytic...
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6065328 |
Apparatus and method for determining thermophysical properties using an isobaric approach
The instant invention relates to a method and apparatus to determine the thermodynamic properties of a gas medium without making a determination of gas composition. In the instant invention, the...
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5987963 |
Method of improving the selectivity of a polymer-film gas sensor and a sensor structure for implementing the method
The invention relates to a method for improving the selectivity of a polymer film gas sensor. According to the method, the gas sensor is heated and a sensor parameter sensitive to the variable...
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5959190 |
Sensor for measuring the composition of mixtures of hydrogen and oxygen gas
A sensor is provided for precisely measuring the composition of mixtures of hydrogen and oxygen gas. The sensor has an active surface, at which hydrogen and oxygen are catalytically converted into...
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5948965 |
Solid state carbon monoxide sensor
A means for detecting carbon monoxide which utilizes an un-heated catalytic material to oxidize carbon monoxide at ambient temperatures. Because this reaction is exothermic, a thermistor in contact...
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5918260 |
Gas sensor with multi-level sensitivity circuitry
A combustible gas detector or sensors having a multi-level sensitivity circuitry. The gas detector has a bridge circuit for outputing voltages indicative of gas concentrations contacting the bridge...
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