✦ LIBER ✦

Domestic gas detection system using two SnO2 integrated sensors

✍ Scribed by V. Demarne; B. Romanowicz; A. Grisel; J. Fournier

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 428 KB
Volume: 19
Category: Article
ISSN: 0925-4005
DOI: 10.1016/0925-4005(93)01116-l

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✦ Synopsis

The use of SnO, sensors in selective alarm systems and gas measurement devices is complicated by the presence of significant cross-sensitivity to various gases, mainly alcohol vapours. This paper presents a simple approach employing analog electronic circuitry which allows the detection of methane above a threshold concentration (ZOOO-SOOLI ppm) in a domestic environment, while the interference of alcohol vapours is eliminated. The device uses two integrated semiconducting gas sensors and is based on a differential measurement of these two sensors.

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