August 2013
Intermediate to advanced
576 pages
17h 9m
English
F. Rettig and R. Moos, University of Bayreuth, Germany
This chapter deals with semiconducting direct thermoelectric gas sensors based on oxide materials. The principle of the sensor is based on a direct measurement of the position of the Fermi level, which can be strongly dependent on the concentration of an analyte in the ambience. The direct thermoelectric gas sensor principle measures a path-independent quantity – the thermovoltage. This makes the sensors extremely resistant to damage stemming from abrasives in gas streams. This chapter shows the importance of developing an adequate transducer, and includes a careful analysis of the sensor signals obtained. From a technological ...
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