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| Number | Title | Issue Date |
| 8161795 | Thermal gas sensor A physical gas sensor of thermal type capable of determining the concentrations of a gas mixture even in the presence of humidity by measuring the thermal diffusivity and conductivity includes a cell with thermal conductivity whose frequency response to the gases is... | 04/24/2012 |
| 8024958 | Gas sensors with thermally insulating ceramic substrates A gas sensor includes a substrate having a low thermal conductivity. Localized heating can be produced using a serpentined heater carried by the substrate. The low thermal conductivity of the substrate substantially confines the generated heat to a region local to t... | 09/27/2011 |
| 7926323 | Thermal conductivity measuring method and apparatus, and gas component ratio measuring apparatus A heat radiation coefficient C [=Ph/(Th−To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. ... | 04/19/2011 |
| 7559228 | Process for measuring the concentration of gases A process is provided for measuring a gas concentration with at least one thermal measuring element. The thermal measuring element is operated by pulses. A measured value of the gas concentration in the environment of the measuring element is obtained from the evalu... | 07/14/2009 |
| 7526942 | Contact combustion gas sensor A contact combustion-type gas sensor that can maintain its initial sensitivity over a long period of time in the presence of silicon vapor, wherein an induction portion 5 of a gas detecting element 1 contains not less than 30 percent by weight of an ox... | 05/05/2009 |
| 7418855 | Gas sensor and control method therefor A gas sensor includes a gas detection chamber into which a detection gas is introduced, a detecting element and a compensating element each disposed in the gas detection chamber, a detection device which detects the concentration of a detection target gas contained ... | 09/02/2008 |
| 7377152 | Method and device for determining a characteristic value that is representative of the condition of a gas The invention relates to a device and methods for characterizating flowing substances, liquid or gas. The device includes: a transport duct with a heating or a cooling element; a temperature difference sensor having a temperature measurement cell downstream of the h... | 05/27/2008 |
| 7360395 | Gas sensor A gas sensor which includes walls delimiting a gas detection chamber, and having an introduction port (or an inlet) through which an observed gas is introduced into the gas detection chamber, a measuring element disposed in the gas detection chamber and measuring co... | 04/22/2008 |
| 7313486 | Apparatus and method for detecting a corrosive substance leak in a chemical composition analyzer An apparatus includes a detection element having a detection element property that changes when exposed to a corrosive substance, a testing device coupled to the detection element, the testing device configrued to measure the detection element property, and a proces... | 12/25/2007 |
| 7287414 | Process for measuring the concentration of gases A process is provided for measuring a gas concentration with at least one thermal measuring element. The thermal measuring element is operated by pulses. A measured value of the gas concentration in the environment of the measuring element is obtained from the evalu... | 10/30/2007 |
| 7267709 | Methods and systems for characterizing a sorbent tube Disclosed are systems and methods that include providing a vessel having an adsorbent disposed therein, the vessel having an inlet and an outlet for communicating a carrier gas through the vessel; determining a differential pressure between the inlet and the outlet ... | 09/11/2007 |
| 7260979 | Oxygen sensor An oxygen sensor includes a sensor element, a holder having a hole through which the sensor element is arranged, a sealing positioning portion for sealing a clearance between the sensor element and the holder and positioning the sensor element in the holder and bein... | 08/28/2007 |
| 7251995 | Fluid flow sensor Two heat generating resistors are formed on a substrate in the upstream side with respect to an air flow direction and two other heat generating resistors are formed in the downstream side. A thermometer resistor for detecting a temperature in the intake manifold is... | 08/07/2007 |
| 7253903 | System and method for determining gas optical density changes in a non-linear measurement regime Each of two sensors, positioned to simultaneously detect electromagnetic radiation absorption along a path, is calibrated to define a unique response curve associated therewith that relates a change in voltage output for each sensor to a change in optical density. A... | 08/07/2007 |
| 7224256 | Stable high temperature heater with serpentine heating strands on insulative substrate A sensor system has an AlN substrate, a W layer on the substrate, a signal source adapted to apply an electrical actuating signal to the W layer, and a sensor adapted to sense the response of the W layer. The W layer can comprise a thin film, with various types of o... | 05/29/2007 |
| 7211222 | Gas sensor A powder filler is stuffed in a filler space defined between a housing and a gas sensing element so as to airtightly seal a clearance between the housing and the gas sensing element. The powder filler contains grains whose diameter is in a range from 80 μm to 5,000... | 05/01/2007 |
| 7191072 | Pressure and temperature measurement of a piezo-resistive device using differential channel of a ratiometric analog to digital converter A temperature and pressure measuring circuit is provided. The circuit comprises an uncompensated pressure transducer, an analog-to-digital converter, a reference resistive device, and first and second switches. The transducer has variable resistive devices between f... | 03/13/2007 |
| 7185527 | Protecting filaments of a thermal conductivity detector A process for protecting a filament in a thermal conductivity detector from chemical corrosion includes changing the flow direction of the column effluent in the thermal conductivity detector to allow the column effluent to bypass the filament when an undesired comp... | 03/06/2007 |
| 7186356 | Analytical device A sensor for chemical species or biological species or radiation presenting to test fluid a polymer composition comprises polymer and conductive filler metal, alloy or reduced metal oxide and having a first level of electrical conductance when quiescent and being co... | 03/06/2007 |
| 7178381 | Portable gas detector The invention provides a portable gas detector which is equipped with filters for removal of interfering gases, high in convenience for use, easy to exchange the filters, and easy to confirm the time the filters are exchanged. The portable gas detector has a housing... | 02/20/2007 |
| 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, a temperature control circuit for maintaining the hydrogen-absorbing ... | 02/13/2007 |
| 7168296 | Methods and systems for characterizing a sorbent tube Disclosed are systems and methods that include providing a vessel having an adsorbent disposed therein, the vessel having an inlet and an outlet for communicating a carrier gas through the vessel; determining a differential pressure between the inlet and the outlet ... | 01/30/2007 |
| 7165441 | Sensor module having a sensor element surrounded by a heating element A sensor module having a heating structure and a sensor element is described. The heating structure surrounds the sensor element so that heat dissipation through a frame is largely prevented. This yields a greater measuring accuracy of the sensor module. In particul... | 01/23/2007 |
| 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. ... | 11/28/2006 |
| 7131766 | Temperature sensor apparatus and method A temperature sensor includes a membrane supported by a substrate and a circuit having elements for a substrate electrical resistance indicative of the temperature of a substrate and a membrane electrical resistance indicative of the temperature of a membrane. The s... | 11/07/2006 |
| 7107821 | Leak indicator with test leak and test leak for integration into a leak indicator A leak indicator including a housing that houses components of the indicator as well as a test leak, and test leaks that are suitable for integration into a leak indicator. ... | 09/19/2006 |
| 7106167 | Stable high temperature sensor system with tungsten on AlN A sensor system has an AlN substrate, a W layer on the substrate, a signal source adapted to apply an electrical actuating signal to the W layer, and a sensor adapted to sense the response of the W layer. The W layer can comprise a thin film, with various types of o... | 09/12/2006 |
| 7104113 | Miniaturized multi-gas and vapor sensor devices and associated methods of fabrication The invention provides a miniaturized sensor device including a thin film membrane having a first surface and a second surface, one or more resistive thin film heater/thermometer devices disposed directly or indirectly adjacent to the first surface of the thin film ... | 09/12/2006 |
| 7100425 | Hydrogen sensor A hydrogen sensor 1 includes detection elements 4A, 4B, 4C formed from hydrogen-absorbing alloys which exhibit different hydrogen-absorbing pressures at a given temperature; a strain gauge 6 which detects changes in volume upon abs... | 09/05/2006 |
| 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, NF3, etc. The detector in a preferred structural arrangement employs a ... | 07/25/2006 |
| 7051578 | Method and apparatus for detecting a gas The present invention relates to a sensor apparatus configured to detect the presence of a gas, such as a tracer gas and a leak detection apparatus configured to detect the presence of a tracer gas and indicate the location of a leak. The leak detection apparatus ma... | 05/30/2006 |
| 7046116 | Temperature probe and its use A temperature probe is provided having a sensor element formed from a ceramic substrate and a platinum thin-film resistor arranged thereon. The platinum thin-film resistor is electrically connected with at least two terminal wires, with the at least two terminal wir... | 05/16/2006 |
| 7031861 | Apparatus and method for calibrating a resistance thermometer and gas analyzer employing same In a calibration apparatus and method for a resistance thermometer a reference thermometer is located in thermal contact with a gas composition to generate, during a calibration period, a first reference temperature value for the gas composition at a first temperatu... | 04/18/2006 |
| 7028530 | Gas detector There is provided a gas detector capable of detecting hydrogen concentration and humidity independently in the environment containing both hydrogen and water vapor. The gas detector comprises a high-temp exothermic detector unit and a low-temp exothermic detector un... | 04/18/2006 |
| 7017389 | Sensors including metal oxides selective for specific gases and methods for preparing same Sensors are provided which are selective for a specific gas. The sensors include a substrate, electrodes, and a thin film metal oxide. Methods for choosing the metal oxide to be utilized in the sensor with selectivity for the specific gas are also provided, as are m... | 03/28/2006 |
| 6997040 | Gas sensor and fabrication method thereof A gas sensor includes a silicon substrate provided with a recess, an insulating layer, a first and a second conductive patterned layers and a detecting portion for sensing a gas which passes there through. In the gas sensor, the insulating layer is formed on a top p... | 02/14/2006 |
| 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 to represent the plurality of hydrocarbon gases in the gas mixture, ... | 02/14/2006 |
| 6991366 | Thermal conductivity measurement method and instrument and method of producing a heat insulating material A method of measuring the heat conductivity of an object to be measured, comprising generating heat between the object to be measured and a heat resistant material, causing heat to flow through the interior of the object to be measured and the interior of the heat r... | 01/31/2006 |
| 6952946 | Method for the gas chromatographic analysis of a sample, and analyzer In a gas chromatograph, an injected sample for analysis (3) is passed through a separation device (5) to separate components present in the sample; at the end of the separation device, selected components are detected by a detector (12) and dete... | 10/11/2005 |
| 6945770 | Fuel metering pump of a heating equipment, particularly water or air heating equipment of a motor vehicle, with control equipment The invention relates to an electric fuel dosing pump (2) of a heating device (1), especially a water heating device in the form of a an auxiliary heater or an independent heating device of an automobile, having a control device (5) for controll... | 09/20/2005 |
