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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. Fuel cell - Wikipedia

    en.wikipedia.org/wiki/Fuel_cell

    The alkaline fuel cell (AFC) or hydrogen-oxygen fuel cell was designed and first demonstrated publicly by Francis Thomas Bacon in 1959. It was used as a primary source of electrical energy in the Apollo space program. [41] The cell consists of two porous carbon electrodes impregnated with a suitable catalyst such as Pt, Ag, CoO, etc.

  4. Solid oxide fuel cell - Wikipedia

    en.wikipedia.org/wiki/Solid_oxide_fuel_cell

    The planar fuel cell design geometry is the typical sandwich type geometry employed by most types of fuel cells, where the electrolyte is sandwiched in between the electrodes. SOFCs can also be made in tubular geometries where either air or fuel is passed through the inside of the tube and the other gas is passed along the outside of the tube.

  5. Hydrogen sensor - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_sensor

    A hydrogen sensor is a gas detector that detects the presence of hydrogen. They contain micro-fabricated point-contact hydrogen sensors and are used to locate hydrogen leaks. They are considered low-cost, compact, durable, and easy to maintain as compared to conventional gas detecting instruments.

  6. 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.

  7. Pirani gauge - Wikipedia

    en.wikipedia.org/wiki/Pirani_gauge

    Thermal radiation () End losses through the support structures; A heated metal wire (sensor wire, or simply sensor) suspended in a gas will lose heat to the gas as its molecules collide with the wire and remove heat. If the gas pressure is reduced, the number of molecules present will fall proportionately and the wire will lose heat more slowly.

  8. Gas detector - Wikipedia

    en.wikipedia.org/wiki/Gas_detector

    These sensors play a critical role in ensuring the safe use of hydrogen across various applications, from fuel cells to industrial processes. Many sensor candidates have been suggested including electrical, [24] [25] optical, [26] [27] acoustical [28]... The main principle behind hydrogen gas sensors is to integrate a catalytic material that ...

  9. Glossary of fuel cell terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_fuel_cell_terms

    The Glossary of fuel cell terms lists the definitions of many terms ... A hydrogen sulfide sensor or H 2 S sensor is a gas sensor for the ... Thermal conductivity

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