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Sensors 2014, 14(4), 6409-6418; doi:10.3390/s140406409

Inflammable Gas Mixture Detection with a Single Catalytic Sensor Based on the Electric Field Effect

1
Engineering Institute of Information and Electricity, China University of Mining Technology, Xuzhou 221116, China
2
School of Electrical and Information Engineering, University of Sydney, Sydney 2009, Australia
*
Author to whom correspondence should be addressed.
Received: 3 March 2014 / Revised: 27 March 2014 / Accepted: 1 April 2014 / Published: 8 April 2014
(This article belongs to the Section Chemical Sensors)
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Abstract

This paper introduces a new way to analyze mixtures of inflammable gases with a single catalytic sensor. The analysis technology was based on a new finding that an electric field on the catalytic sensor can change the output sensitivity of the sensor. The analysis of mixed inflammable gases results from processing the output signals obtained by adjusting the electric field parameter of the catalytic sensor. For the signal process, we designed a group of equations based on the heat balance of catalytic sensor expressing the relationship between the output signals and the concentration of gases. With these equations and the outputs of different electric fields, the gas concentration in a mixture could be calculated. In experiments, a mixture of methane, butane and ethane was analyzed by this new method, and the results showed that the concentration of each gas in the mixture could be detected with a single catalytic sensor, and the maximum relative error was less than 5%. View Full-Text
Keywords: gas analysis; catalytic sensor; safety monitoring in mines gas analysis; catalytic sensor; safety monitoring in mines
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Tong, Z.; Tong, M.-M.; Meng, W.; Li, M. Inflammable Gas Mixture Detection with a Single Catalytic Sensor Based on the Electric Field Effect. Sensors 2014, 14, 6409-6418.

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