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  2. Thermal conductivity detector - Wikipedia

    en.wikipedia.org/wiki/Thermal_conductivity_detector

    The thermal conductivity detector (TCD), also known as a katharometer, is a bulk property detector and a chemical specific detector commonly used in gas chromatography. [1] This detector senses changes in the thermal conductivity of the column eluent and compares it to a reference flow of carrier gas. Since most compounds have a thermal ...

  3. Helium analyzer - Wikipedia

    en.wikipedia.org/wiki/Helium_analyzer

    Portable instruments for the analysis of helium content of breathing gas mixtures may be based on a thermal conductivity sensor (katharometer). These sensors can be very stable and maintenance free and also highly reliable and accurate. [1] A typical thermal helium analyser comprises two chambers, each with an identical thermal conductivity sensor.

  4. Transient hot wire method - Wikipedia

    en.wikipedia.org/wiki/Transient_Hot_Wire_Method

    The transient hot wire method has advantage over the other thermal conductivity methods, since there is a fully developed theory and there is no calibration or single-point calibration. Furthermore, because of the very small measuring time (1 s) there is no convection present in the measurements and only the thermal conductivity of the fluid is ...

  5. Thermal conductivity measurement - Wikipedia

    en.wikipedia.org/wiki/Thermal_conductivity...

    The heat generated dissipates into the sample on both sides of the sensor, at a rate depending on the thermal transport properties of the material. By recording temperature vs. time response in the sensor, the thermal conductivity, thermal diffusivity and specific heat capacity of the material can be calculated.

  6. Thermal analysis - Wikipedia

    en.wikipedia.org/wiki/Thermal_analysis

    The information gathered can even be enhanced by coupling the simultaneous thermal analysis instrument to an Evolved Gas Analyzer like Fourier transform infrared spectroscopy or mass spectrometry. Other, less common, methods measure the sound or light emission from a sample, or the electrical discharge from a dielectric material, or the ...

  7. Thermal conduction - Wikipedia

    en.wikipedia.org/wiki/Thermal_conduction

    Thermal conduction property of any gas under standard conditions of pressure and temperature is a fixed quantity. This property of a known reference gas or known reference gas mixtures can, therefore, be used for certain sensory applications, such as the thermal conductivity analyzer.

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