Oxygen concentration-sensing device

Details Oxygen concentration-sensing device Oxygen concentration-sensing device

1988-12-14

1990-10-16

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204408, 219499, G01N 27409

Patent

active

049632469

ABSTRACT:
An oxygen concentration-sensing device has an oxygen concentration-sensing element which senses the concentration of oxygen contained in a gas, and a heater which heats the sensing element. A control device is electrically connected to the heater for controlling the supply of electricity to the heater so as to bring the temperature of the heater to a desired temperature. A coupler connects between the sensing element and the control device. A compensating resistance is accommodated in the coupler, which has a resistance value corresponding to a resistance value of the heater assumed at the desired temperature. The control device controls the supply of electricity to the heater based upon electrical information obtained from the compensating resistance.

REFERENCES:
patent: 3946198 (1976-03-01), Foote
patent: 4384934 (1983-05-01), de Bruin et al.
patent: 4471648 (1984-09-01), Uchida et al.
patent: 4601809 (1986-07-01), Kitahara
patent: 4708777 (1987-11-01), Kuraoka
patent: 4761539 (1988-08-01), Carmean

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