Article (Scientific journals)
Long term stability of metal oxide-based gas sensors for e-nose environmental applications : an overview
Romain, Anne-Claude; Nicolas, Jacques
2010In Sensors and Actuators. B, Chemical, 146, p. 502-506
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Keywords :
e-nose; Tin oxide sensors; drift; Environmental application
Abstract :
[en] The e-nose technology has enormous potentialities for in site monitoring of off-odours. However a number of limitations are associated with the properties of chemical sensors, the signal processing performances and the real operating conditions of the environmental field. The field experience of the research group included testing of a large amount of sensors in different sensor technologies and among those the metal oxide-based gas sensors (Figaro type) are the best gas sensors for long term application, as stated during more than 1 year of field testing. To be usable for the off-odours field measurement, the e-nose has to deal with the lack of long term stability of these sensors. The drift and the sensors replacement have to be considered. In order to appraise the time evolution of the sensors and the effect on the results of an electronic nose, experimentation has been performed during more than 3 years on two identical sensor arrays. The two arrays contain the same six Figaro sensors and are in the same sensor chamber of the e-nose system. Both arrays have worked continuously, without break. This paper presents the drift of some TGS sensors for 7 years as well as the difference in the temporal behaviour of identical sensors and the consequence on the e-nose results after the sensor replacement in the sensors array. A correction of the drift and of the replacement effect is applied and the classification results are exposed, with and without correction.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Romain, Anne-Claude  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Surveillance de l'environnement
Nicolas, Jacques ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Surveillance de l'environnement
Language :
English
Title :
Long term stability of metal oxide-based gas sensors for e-nose environmental applications : an overview
Publication date :
29 April 2010
Journal title :
Sensors and Actuators. B, Chemical
ISSN :
0925-4005
eISSN :
1873-3077
Publisher :
Elsevier Science, Lausanne, Switzerland
Volume :
146
Pages :
502-506
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 May 2010

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