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Identification of H2S impurity in hydrogen using temperature modulated metal oxide resistive sensors with a novel signal processing technique
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Urasinska-Wojcik, Barbara and Gardner, J. W. (2017) Identification of H2S impurity in hydrogen using temperature modulated metal oxide resistive sensors with a novel signal processing technique. IEEE Sensors Letters, 1 (4). 4500204. doi:10.1109/LSENS.2017.2709345 ISSN 1530-437X.
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Official URL: http://doi.org/10.1109/LSENS.2017.2709345
Abstract
We report here on the results of a study on the response of copper oxide (p-type and mixed) based, lowpower MEMS gas sensors to ppm levels of hydrogen sulfide in a hydrogen atmosphere. It is shown that a thermallymodulated metal oxide gas sensor can be used for the identification of the H2S impurity in a reducing environment without the need for a reference gas or baseline signal. It was found that using this material with a method of transient frequency analysis, a resistive gas sensor can operate reliably in a harsh environment, e.g. pure hydrogen and elevated humidity levels. A linear response in gas concentration was obtained from the analysis of transient sensor signal. This novel temperature modulation technique is more effective than an isothermal method where H2 background is introduced, due to the elimination of drift and additive noise in the sensor response that limits the practical utilization of these low cost sensors.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Computer Science | ||||||||
Journal or Publication Title: | IEEE Sensors Letters | ||||||||
Publisher: | IEEE | ||||||||
ISSN: | 1530-437X | ||||||||
Official Date: | August 2017 | ||||||||
Dates: |
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Volume: | 1 | ||||||||
Number: | 4 | ||||||||
Article Number: | 4500204 | ||||||||
DOI: | 10.1109/LSENS.2017.2709345 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 25 May 2017 | ||||||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||||
Grant number: | EP/L018330/1 | ||||||||
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