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B7.4 - YSZ Thick Film Oxygen Gas Sensor Using the Direct Ionic Thermoelectric Effect

Event
SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg
Band
Proceedings SENSOR 2009, Volume II
Chapter
B7 - Gas and Humidity
Author(s)
U. Roeder-Roith, F. Rettig, K. Sahner, R. Moos - University of Bayreuth, Bayreuth, Germany, T. Roeder, J. Janek - Justus-Liebig-University Gießen, Gießen, Germany
Pages
129 - 132
DOI
10.5162/sensor09/v2/b7.4
ISBN
978-3-9810993-5-5
Price
free

Abstract

The introduced thick-film sensor determines the oxygen partial pressure by measuring the thermopower over an oxygen ion conductor. The measurand is a voltage, which means that the sensor signal is independent on geometry. That is advantageous for long-term stability because the influence of aging effects like cracks or sintering is low. Another advantage of this method compared to the measuring of a Nernst voltage (e.g. in a λ-probe) is that no reference atmosphere is needed. So, the sensor setup can be designed easier.

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