UNSPECIFIED (1997) Characterisation of a thermal wave microsensor for the intelligent analysis of atmospheric gases. In: 8th Conference on Sensors and Their Applications, SEP 07-10, 1997, GLASGOW, SCOTLAND.

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Abstract

This paper describes the characterisation of a metal oxide resistive gas sensor when subjected to d.c. and a.c. thermal fluctuations. The measurement system comprises precision analogue circuitry both to generate thermal waves in an integrated platinum resistive heater and to monitor the oxide resistance, and a virtual instrument running on a 486-based PC. Response of the microsensor to ppm levels of CO are reported with a typical operating temperature of 300 degrees C and 10 degrees C thermal oscillations at frequencies of up to 1 Hz. Thermal wave gas sensors are of potential application in the field of environmental monitoring because they do not require a zero-gas to define a baseline signal and can discriminate between several gases employing only one non-specific gas-sensitive coating.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Series Name:	SENSORS SERIES
Journal or Publication Title:	SENSORS AND THEIR APPLICATIONS VIII
Publisher:	IOP PUBLISHING LTD
ISBN:	0-7503-0421-9
Editor:	Augousti, AT and White, NM
Date:	1997
Number of Pages:	6
Page Range:	pp. 89-94
Publication Status:	Published
Title of Event:	8th Conference on Sensors and Their Applications
Location of Event:	GLASGOW, SCOTLAND
Date(s) of Event:	SEP 07-10, 1997
URI:	http://wrap.warwick.ac.uk/id/eprint/17657

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