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Chemical Sensors for CO/NOx-Detection in Automotive Climate Control Systems
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Abstract
A new air quality sensor for climate control in automobiles has been developed. The sensor is designed for use in air conditioning systems with an air intake flap and a charcoal filter. The main indicators for the detection of air pollution are CO and NOx.
The sensor elements consist of a SnO2 layer made in thick film technology resulting in small sensor size and high sensitivity at reasonable cost. The sensor elements are packaged together with an evaluation circuit in a water resistant sensor housing for underhood installation. By means of specific dopants the sensor elements have been optimized in order to detect CO and NOx with very low cross-sensitivity.
This paper describes the design and production of the sensor. The performance of the complete unit under typical field conditions is presented. The sensor is in serial production.
Authors
Citation
Ingrisch, K., Zeppenfeld, A., Bauer, M., Ziegenbein, B. et al., "Chemical Sensors for CO/NOx-Detection in Automotive Climate Control Systems," SAE Technical Paper 960692, 1996, https://doi.org/10.4271/960692.Also In
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