Platform for a hydrocarbon exhaust gas sensor utilizing a pumping cell and a conductometric sensor

Title data

Biskupski, Diana ; Geupel, Andrea ; Wiesner, Kerstin ; Fleischer, Maximilian ; Moos, Ralf:
Platform for a hydrocarbon exhaust gas sensor utilizing a pumping cell and a conductometric sensor.
In: Sensors. Vol. 9 (2009) Issue 9 . - pp. 7498-7508.
ISSN 1424-8220
DOI: https://doi.org/10.3390/s90907498

Project information

Abstract in another language

Very often, high-temperature operated gas sensors are cross-sensitive to oxygen and/or they cannot be operated in oxygen-deficient (rich) atmospheres. For instance, some metal oxides like Ga2O3 or doped SrTiO3 are excellent materials for conductometric hydrocarbon detection in the rough atmosphere of automotive exhausts, but have to be operated preferably at a constant oxygen concentration. We propose a modular sensor platform that combines a conductometric two-sensor-setup with an electrochemical pumping cell made of YSZ to establish a constant oxygen concentration in the ambient of the conductometric sensor film. In this paper, the platform is introduced, the two-sensor-setup is integrated into this new design, and sensing performance is characterized. Such a platform can be used for other sensor principles as well.