Articles | Volume 4, issue 2
https://doi.org/10.5194/jsss-4-305-2015
Special issue:
https://doi.org/10.5194/jsss-4-305-2015
Regular research article
 | 
19 Oct 2015
Regular research article |  | 19 Oct 2015

A novel approach for detecting HMDSO poisoning of metal oxide gas sensors and improving their stability by temperature cycled operation

M. Schüler, T. Sauerwald, and A. Schütze

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Cited articles

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Baumbach, M., Kammerer, T., Sossong, A., and Schütze, A.: A new method for fast identification of gases and gas mixtures after sensor power up, Proc. IEEE Sensors, 3, 1388–1391, https://doi.org/10.1109/ICSENS.2004.1426443, 2004.
Baur, T., Schütze, A., and Sauerwald, T.: Optimierung des temperaturzyklischen Betriebs von Halbleitergassensoren/Optimization of temperature cycled operation of semiconductor gas sensors, Tech. Mess. 82, 187–195, https://doi.org/10.1515/teme-2014-0007, 2015.
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Ehrhardt, J.-J., Colin, L., and Jamois, D.: Poisoning of platinum surfaces by hexamethyldisiloxane (HMDS): application to catalytic methane sensors, Sensor. Actuator. B-Chem. 40, 117–124, https://doi.org/10.1016/S0925-4005(97)80250-X, 1997.
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Short summary
We study the effect of HMDSO vapor on an SnO2-based gas sensor in temperature cycled operation (TCO). The poisoning can be quantified at early stages with a resolution of ±85 ppm*min using TCO. This approach provides a simple method for early detection of HMDSO poisoning. The stability of gas discrimination by linear discriminant analysis (LDA) can be improved using normalization, which in turn facilitates a more accurate determination of the poisoning state by hierarchical LDA discrimination.
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