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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. Thermoelectric generator - Wikipedia

    en.wikipedia.org/wiki/Thermoelectric_generator

    Because both the thermal and electrical conductivity correlate with the charge carriers, new means must be introduced in order to conciliate the contradiction between high electrical conductivity and low thermal conductivity, as is needed. [23] When selecting materials for thermoelectric generation, a number of other factors need to be considered.

  4. Thermal conductivity measurement - Wikipedia

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

    The range of thermophysical properties can be covered by different forms of the technique, with the exception that the recommended thermal conductivity range where the highest precision can be attained is 0.01 to 150 W/m•K for the linear source freestanding sensor and 500 to 8000 J/m2•K•s0.5 for the planar source freestanding sensor.

  5. Pirani gauge - Wikipedia

    en.wikipedia.org/wiki/Pirani_gauge

    Pirani was aware of the gas thermal conductivity investigations of Kundt and Warburg [4] (1875) published thirty years earlier and the work of Marian Smoluchowski [5] (1898). In 1906 he described his "directly indicating vacuum gauge" that used a heated wire to measure vacuum by monitoring the heat transfer from the wire by the vacuum environment.

  6. Magnetohydrodynamic generator - Wikipedia

    en.wikipedia.org/wiki/Magnetohydrodynamic_generator

    A magnetohydrodynamic generator (MHD generator) is a magnetohydrodynamic converter that transforms thermal energy and kinetic energy directly into electricity.An MHD generator, like a conventional generator, relies on moving a conductor through a magnetic field to generate electric current.

  7. 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 ...

  8. Thermopile - Wikipedia

    en.wikipedia.org/wiki/Thermopile

    Picture of a heat flux sensor that utilizes a thermopile construction to directly measure heat flux. Model shown is the FluxTeq PHFS-01 heat flux sensor. Voltage output is passively induced from the thermopile proportional to the heat flux through the sensor or similarly the temperature difference across the thin-film substrate and number of ...

  9. Pellistor - Wikipedia

    en.wikipedia.org/wiki/Pellistor

    A pellistor is a solid-state device [1] used to detect gases which are either combustible or which have a significant difference in thermal conductivity to that of air. The word "pellistor" is a combination of pellet and resistor .

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