Air pollution monitoring using semiconductor toxic gas sensors

Author

Caldararu, Florin ; Caldararu, Mira ; Jelev, Adrian ; Iacob, A.

Author_Institution

ECOSEN SRL, Bucharest, Romania

Volume

1

fYear

1994

fDate

8-12 Aug 1994

Firstpage

13

Abstract

The SnO₂ toxic gas sensors, which are usually used in alarm systems, were integrated in air pollution monitoring systems for ammonia, hydrogen sulphide, carbon monoxide and freon (R113 and R22). The sensitivity curves were extended for small concentrations using a parameter extraction method based on a simple semiconductor theory and on a n-dimensional minimisation algorithm. The sensors are working in real-time regime, 100 concentration values for each sensor were measured in 30 minutes. Concentrations lower than EPA limits have been measured

Keywords

air pollution measurement; alarm systems; atmospheric composition; atmospheric measuring apparatus; atmospheric techniques; gas sensors; semiconductor materials; tin compounds; CO; H₂S; NH₃; R113; R22; SnO₂; air pollution; alarm system; atmosphere; calibration curves; chemical analysis; chemical composition; chlorofluorocarbon; concentration; freon; halocarbon; instrument detector; measurement technique; monitoring; n-dimensional minimisation; parameter extraction method; real-time; semiconductor toxic gas sensor; sensitivity curve; Air pollution; Alarm systems; Atmospheric measurements; Carbon dioxide; Gas detectors; Hydrogen; Minimization methods; Monitoring; Parameter extraction; Pollution measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1994. IGARSS '94. Surface and Atmospheric Remote Sensing: Technologies, Data Analysis and Interpretation., International

Conference_Location

Pasadena, CA

Print_ISBN

0-7803-1497-2

Type

conf

DOI

10.1109/IGARSS.1994.399036

Filename

399036