Articles | Volume 4, issue 2
https://doi.org/10.5194/jsss-4-281-2015
https://doi.org/10.5194/jsss-4-281-2015
Regular research article
 | 
08 Sep 2015
Regular research article |  | 08 Sep 2015

A new low-cost hydrogen sensor build with a thermopile IR detector adapted to measure thermal conductivity

M. Liess

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Cited articles

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Short summary
Hydrogen detection for purposes such as smart gas metering or fuel cell safety can be done by using a low-cost off-the-shelf thermopile IR radiation sensor and by driving it as a TCD (thermal conductivity detector). The MEMS thermopile sensor element is exposed to the measured gas environment. By applying an AC heating voltage to the thermopile structure and by measuring its DC output voltage, the hydrogen concentration of its gas environment can be measured with a resolution of up to 3.7ppm.