- Author
-
Jones, T. A.
- Title
- Semiconductor Gas Sensors.
- Coporate
- Health and Safety Executive, Sheffield, England
- Journal
-
IEE Colloquium Digest,
Vol. 1985,
No. 54,
1-4,
1985
- Book or Conf
- Institution of Electrical Engineers (IEE). IEE Colloquium on Solid State and Smart Sensors. May 14, 1985,
London, England,
1985
- Keywords
-
gas detectors
|
sensors
|
semiconductor devices
|
metal oxides
- Identifiers
- semiconductor materials; electric conductivity; gas adsorption; hazardous gas detectors; Institution of Electrical Engineers (IEE)
- Abstract
- In this paper the advantages and disadvantages of this type of gas sensor are discussed and illustrated with reference to two sensors which use a metal oxide and an organic semiconductor respectively. The first is based on a single crystal of ZnO which can be used either for measurement of low levels of CO or for providing an early indication of onset of a fire by detecting the gaseous products evolved. The second, based on a film of lead phthalocyanine (PbPc), provides a means of selectively detecting strongly electrophilic gases such as NO2 and C12.