Temperature Modulated Thermoelectric Gas Sensors

Titelangaben

Hagen, Gunter ; Leupold, Nico ; Wiegärtner, Sven ; Wittmann, Hubert ; Moos, Ralf:
Temperature Modulated Thermoelectric Gas Sensors.
2015
Veranstaltung: Sensor 2015, The 17th International Conference on Sensors and Measurement Technology , 19.-21.05.2015 , Nürnberg, Deutschland.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Vortrag )
DOI: https://doi.org/10.5162/sensor2015/E7.2

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Abstract

The output of a thermoelectric gas sensor is a voltage signal that is proportional to the exothermicity, generated during oxidation of reducing gases on a catalyst. A temperature difference between the catalytically active (due to a catalyst film) and an inert part of the device is measured by screen-printed thermopiles. When the absolute sensor temperature is modulated, the resulting signals depend on the catalyst’s conversion behavior and are a characteristic for certain gas species. It could be shown that differentiation between gas components, e.g. alkanes and alkenes in a gas mixture is possible.