Limiting electric current type oxygen sensor with heater and lim

Details Limiting electric current type oxygen sensor with heater and lim Limiting electric current type oxygen sensor with heater and lim

1983-01-14

1985-04-09

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204426, 204408, G01N 2758

Patent

active

045100365

ABSTRACT:
The invention provides a limiting electric current type oxygen sensor with a microheater, having: an oxygen ionic conductor; an anode and a cathode respectively formed on two major surfaces of the oxygen ionic conductor; an insulating film which has a porosity of not less than 0.2 [%], an average pore diameter of not less than 140 [.ANG.], and a thickness between 0.2 [.mu.m] and 10 [.mu.m], and which is formed on one of the anode and the cathode so as to regulate a flow rate of oxygen gas and to provide electrical insulation; and the microheater formed on the insulating film. The oxygen ionic conductor is electrically insulated from the microheater through the insulating film. The invention also provides a limiting electric current type oxygen concentration detecting device having the limiting electric current type oxygen sensor and a constant temperature control circuit.

REFERENCES:
patent: 3767469 (1973-10-01), Flais et al.
patent: 3948081 (1976-04-01), Wessel et al.
patent: 4107019 (1978-08-01), Takao et al.
patent: 4129099 (1978-12-01), Howarth
patent: 4212720 (1980-07-01), Maurer et al.
patent: 4300990 (1981-11-01), Maurer
patent: 4304652 (1981-12-01), Chiba et al.
patent: 4334974 (1982-06-01), Muller et al.
patent: 4345985 (1982-08-01), Tohda et al.
patent: 4365604 (1982-12-01), Sone
patent: 4384934 (1983-05-01), de Bruin et al.

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