Sensor system for indoor air monitoring using semiconducting metal oxides and IR-absorption

Citation
J. Frank et H. Meixner, Sensor system for indoor air monitoring using semiconducting metal oxides and IR-absorption, SENS ACTU-B, 78(1-3), 2001, pp. 298-302
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
SENSORS AND ACTUATORS B-CHEMICAL
ISSN journal
0925-4005 → ACNP
Volume
78
Issue
1-3
Year of publication
2001
Pages
298 - 302
Database
ISI
SICI code
0925-4005(20010830)78:1-3<298:SSFIAM>2.0.ZU;2-I
Abstract
A sensor system for the simultaneous monitoring Of CO2 and olfactory or exp losive gases in room air is described. This system combines the functionali ty of semiconducting metal oxides and infrared absorption for gas detection . With the infrared radiation emitted by the heated metal oxide gas sensor an optical gas sensor for the CO2 detection is driven. Hence, the metal oxi de gas sensor acts both as sensor for olfactory or explosive gases and as i nfrared source of the optical sensor. An experimentally validated model was set-up which describes the propagation of the emitted infrared radiation i n the sensor system. Using the optical g-as sensor the detection of 1000 PP M CO2 is possible with small cross-sensitivities to reducing gases which ar e caused mainly by reactions of gases with the heated metal oxide gas senso r. (C) 2001 Elsevier Science B.V. All rights reserved.