Platform for a Hydrocarbon Exhaust Gas Sensor Utilizing a Pumping Cell and a Conductometric Sensor

Sensors

Diana Biskupski²  Andrea Geupel²  Kerstin Wiesner¹  Maximilian Fleischer¹ 

[1]Siemens AG, Corporate Research & Technology, Sensor Systems, 81739 Munich, Germany

[2]Bayreuth Engine Research Center, Functional Materials, University of Bayreuth, 95440 Bayreuth, Germany

关键词: hydrocarbon exhaust gas sensor;    strontium titanate;    gallium oxide;    electrochemical pumping cell;    exhaust gas sensor;   

DOI  :  10.3390/s90907498

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee MDPI, Basel, Switzerland