Gas detector

Details Gas detector Gas detector

1983-04-27

1984-11-06

Albritton, C. L.

Electrical resistors

Resistance value responsive to a condition

Gas, vapor, or moisture absorbing or collecting

73 23, 73 27R, 422 94, 422 98, G01N 2704, H01L 700

Patent

active

044814992

ABSTRACT:
A gas detector with a layer of gas sensing material comprising an oxide semiconductor, wherein at least one coating layer each of a p-type oxide semiconductor and an n-type oxide semiconductor is provided in a multi-layer arrangement on the surface of said layer of gas sensing material that contacts the gas. The gas detector can selectively identify only specific gases.

REFERENCES:
patent: 3644795 (1972-02-01), Taguchi
patent: 3695848 (1972-10-01), Taguchi
patent: 3951603 (1976-04-01), Obayashi et al.
patent: 4001756 (1977-01-01), Heijne
patent: 4033169 (1977-07-01), Fujishiro et al.
patent: 4039941 (1977-08-01), Morrison
patent: 4223550 (1980-09-01), Takahama et al.
patent: 4224280 (1980-09-01), Takahama et al.
patent: 4322968 (1982-04-01), Takami et al.
patent: 4351182 (1982-09-01), Schmidberger

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