Oxygen concentration detection system

Details Oxygen concentration detection system Oxygen concentration detection system

1986-03-19

1987-10-27

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204421, 204425, 204 15, G01N 2730

Patent

active

047028165

ABSTRACT:
An oxygen concentration detection system includes an oxygen sensor unit sensitive to oxygen in ambient oxygen-containing gases, an activating current supply operative to supply an activating current to the oxygen sensor unit. The oxygen sensor unit is responsive to the activating current and operative to produce a sensor signal voltage variable with the concentration of oxygen in the oxygen-containing gases. A reference signal generator produces a predetermined reference signal, the activating current supply means is responsive to the reference signal for producing the activating current. A current limiting circuit limits the oxygen concentration below a predetermined value which is variable with one of the activating current and the sensor signal voltage.

REFERENCES:
patent: 4440621 (1984-04-01), Kitahara
patent: 4586476 (1986-05-01), Asayama
patent: 4609452 (1986-09-01), Shimomura

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