Selectivity enhancement of tin dioxide gas sensor with polymer membrane

Author

Wong, Kenneth K L ; Tang, Zhenan ; Sin, Johnny K O ; Chan, Philip C.H. ; Cheung, Peter W. ; Hiraoka, Hiroyuki

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Clear Water Bay, Hong Kong

fYear

1995

fDate

6-10 Nov 1995

Firstpage

179

Lastpage

182

Abstract

The application of a polymer to enhance the selectivity of a tin dioxide gas sensor is presented. Commercial polymer, XU218 of Ciba-Geigy company, is coated on the sensing film of a tin dioxide gas sensor FIGARO TGS842 which was designed to detect methane. The polymer coated sensor is calibrated in a high accuracy testing chamber that is controlled by PC with GPIB and mass flow controllers (MFCs). Three gases, hydrogen, methane, and ammonia, are used to investigate the response of the sensor. It is found that the sensor shows a characteristic change in response to ammonia and almost negligible change in response to hydrogen and methane

Keywords

gas sensors; membranes; polymer films; tin compounds; Ciba-Geigy company; FIGARO TGS842; GPIB; H₂; NH₃; PC control; SnO₂; XU218; ammonia; calibration; hydrogen; mass flow controller; methane; polymer membrane; selectivity; testing chamber; tin dioxide gas sensor; Biomembranes; Chemical technology; Gas detectors; Gases; Permeability; Polymer films; Sensor phenomena and characterization; Temperature sensors; Testing; Tin;

fLanguage

English

Publisher

ieee

Conference_Titel

Microelectronics and VLSI, 1995. TENCON '95., IEEE Region 10 International Conference on

Print_ISBN

0-7803-2624-5

Type

conf

DOI

10.1109/TENCON.1995.496367

Filename

496367