Study on selectivity enhancement of tin dioxide gas sensor using non-conducting polymer membrane

Kenneth K.L. Wong, Zhenan Tang, Johnny K.O. Sin, Philip Ching Ho Chan, Peter W. Cheung, Hiroyuki Hiraoka

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

6 Citations (Scopus)


Non-conducting polymer membrane can be used as molecular sieve to enhance the selectivity of tin dioxide gas sensor. A commercial polymer, polyimide XU218 of Eiba-Geigy company, is coated on the surface 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 system which 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.
Original languageEnglish
Title of host publicationProceedings of the IEEE Hong Kong Electron Devices Meeting
Number of pages4
Publication statusPublished - 1 Dec 1995
Externally publishedYes
EventProceedings of the 1995 IEEE Hong Kong Electron Devices Meeting - Hong Kong, Hong Kong
Duration: 1 Jul 19951 Jul 1995


ConferenceProceedings of the 1995 IEEE Hong Kong Electron Devices Meeting
Country/TerritoryHong Kong
CityHong Kong

ASJC Scopus subject areas

  • Engineering(all)

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