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Thermoconductivity

Thermoconductivity patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

Related Categories:

Measuring And Testing


Gas Analysis > By Thermal Property > Thermoconductivity



Method and measuring apparatus for determining physical properties of gas
11/27/14 - 20140345363 - A method for determining physical properties of combustion including: flowing a gas a critical nozzle and past a microthermal sensor wherein the mass flow of the gas through the critical nozzle is the same as the mass flow through the microthermal sensor; measuring the pressure drop in a reservoir of...

Integrated circuit comprising a thermal conductivity based gas sensor
04/17/14 - 20140102172 - An integrated circuit and a method of making the same. The integrated circuit includes a semiconductor substrate. The integrated circuit also includes a relative humidity sensor on the substrate. The relative humidity sensor includes a first sensor electrode, a second sensor electrode, and a humidity sensitive layer covering the first...

Measuring head for a device for measuring the concentration of at least one gas in a gas sample
02/13/14 - 20140041438 - A measurement head is provided for a device for measuring the concentration of at least one gas, in particular oxygen. A gas sample a measurement element (1) is arranged in the region of an opening on a circuit board (11). To convey gas a duct (16, 17) is formed in...

Fluid property sensor with heat loss compensation and operating method thereof
01/30/14 - 20140026640 - An improved Pirani sensor uses a measuring element disposed within a fluid between a base plate and a cover. The measuring element is held by suspension members that are connected to the base plate. A heating element is thermally conductively connected to the suspension members. Using the sensor the characteristic...

Leak detector
08/22/13 - 20130213114 - The invention relates to a leak detector comprising a first sensor for detecting a gas component (helium) in a gas taken in. Because the sensor is susceptible to saturation or contamination, a second sensor is provided. The sensor is a thermal conductivity sensor. The thermal conductivity sensor has a lower...

Gas detector
08/16/12 - 20120204623 - A gas detector for use in, for example, measuring the concentration of flammable gas or detecting leakage of flammable gas. The gas detector has a gas detection element in which at least a heat-generating resistor and an insulation layer are laminated on a semiconductor substrate made of silicon while the...

Method for determining gas concentrations in a gas mixture based on thermal conductivity measurements with correction of measured values
03/29/12 - 20120073357 - A method for the determination of gas concentrations xi in a gas mixture using a thermal conductivity detector with a Wheatstone bridge. It comprises the following method steps: measuring the bridge voltage Xa; correcting the measured values for the bridge voltage Xa, in particular with respect to drift; determination of...

Thermal conductivity detectors
02/02/12 - 20120024043 - Thermal conductivity detectors and methods of operating thermal conductivity detectors are described herein. One or more device embodiments include a single fluidic channel, wherein the single fluidic channel includes a single inlet and a single outlet, and multiple sensors configured to determine one or more properties associated with a thermal...

Calorific value calculation formula generating system, calorific value calculation formula generating method, calorific value calculating system, and calorific value calculating method
08/04/11 - 20110185789 - A calorific value calculation formula generating system is equipped with a measuring mechanism for measuring heat dissipation constant values or thermal conductivity values of each of plural mixed gases each containing plural kinds of gas components at plural temperatures; and a formula generation module for generating a calorific value calculation...

Thermal gas sensor
06/30/11 - 20110154885 - The present invention provides a high-responsiveness and high-accuracy thermal gas sensor configured to enable gas to be analyzed based on a variation in heat conductivity. The thermal gas sensor includes a substrate 2 with a cavity portion 5, a thin-film support 6 stacked in the cavity portion and comprising a...

Thermal conductivity detector
05/12/11 - 20110107816 - A thermal conductivity detector includes a structure defining a cavity, the structure principally comprising a material having a first coefficient of thermal expansion; a sensing element for sensing a thermal conductivity of a gas flowing within the cavity, the sensing element having a second coefficient of thermal expansion different from...

Particle sensor
05/12/11 - 20110107817 - A particle sensor including a diaphragm, a diaphragm heater, and at least two measuring electrodes situated on the diaphragm, for electrical conductivity measurement, the diaphragm having a thickness of less than or equal to 50 μm, in order to allow a calorimetric particle quantity determination....

Hydrogen chlorine level detector
04/07/11 - 20110079074 - A method for detecting a ratio of a first substance to that of a second substance in a mixture of substances, includes generating heat in a heating element; measuring a temperature proximate to the heating element; and calculating the ratio of the first substance to that of the second substance...

Fluid identification device and fluid identification method
11/25/10 - 20100294021 - A fluid identification device of long life for identification of a target fluid. The device uses at least two liquid type detection parts each of which is equipped with both of a temperature detector and a heating element, selects electrical conduction to any one of the heating elements, and identifies...

Thermal conductivity sensor
09/30/10 - 20100242573 - The measurement sensitivity is improved by suppressing the surrounding temperature influence as much as possible, while realizing scale reduction, and by enlarging the detection signal, while reducing the production errors in enclosing a reference gas. Provided is a thermal conductivity sensor that detects thermal conductivity of a sample gas by...

Detection unit mold package and fluid discrimination sensor module using the mold package
08/26/10 - 20100212400 - Provided is a detection unit mold package (2A), which is equipped with plate-shaped protrusions (21P and 22P) to contact an object liquid so as to exchange the heat with the object liquid. The plate-shaped protrusions (21P and 22P) are formed by sealing a liquid-kind detecting unit (21a) and a liquid-temperature...

Method for sensing gas composition and pressure
06/24/10 - 20100154510 - A method for sensing gas composition and gas pressure, based on the thermal constants of a variable electrical resistor, is presented. The method for sensing gas composition and pressure includes monitoring a variable electrical resistor whose dynamic thermal response is determined by the thermal conductivity and thermal capacity of the...

Apparatus and method for multi-dimensional gas chromatography
06/24/10 - 20100154511 - A method and apparatus for two-dimensional gas chromatography (GC), including a valve having first and second positions (P1, and P2), and first through fourth sample flow paths (FP1-FP4). In P1, a first gas sample is collected from a first dimension GC column via FP1, a first pressure source and a...

Thermal gas sensor
05/13/10 - 20100116024 - 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 known, in particular in respect of humidity, delivering...

Thermal conductivity measuring method and apparatus, and gas component ratio measuring apparatus
11/12/09 - 20090277246 - 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. Further, a thermal conductivity λ(T) of...

Phased micro analyzer viii
04/23/09 - 20090100906 - A micro fluid analyzer that may be highly sensitive, fast and very compact. The analyzer may use sufficiently low power per analysis to be easily implemented with an equivalently small battery pack or other portable power source. There may be energy conservation features in the analyzer, such as optimal adsorber...