Oxygen sensor

Details Oxygen sensor Oxygen sensor

1977-08-22

1979-03-20

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

60276, 123119E, 123119EC, G01N 2746

Patent

active

041452720

ABSTRACT:
A platinum reference electrode is disposed on the surface of a blind bore formed in a body of solid zirconia electrolyte and two semi cylindrically shaped measuring electrodes one platinum the other gold are disposed on the outer surface of the body. A first annular insulator supports the body within the casing and defines two chambers on either side thereof while a second annular insulator supports and presses lead wires against the measuring electrodes. A cylindrical connector is inserted into the blind bore to provide good electrical connection between the platinum reference electrode and a lead line.
Atmospheric air enters the first chamber and the blind bore while exhaust gases enter the second chamber and contact the measuring electrodes; the platinum/platinum and platinum/gold electrodes produce markedly different signals one of which is used to recalibrate the other as the peak output voltages decrease with time and temperature.

REFERENCES:
patent: 3844920 (1974-10-01), Burgett et al.
patent: 3891529 (1975-06-01), Beesch
patent: 3941673 (1976-03-01), Takao et al.
patent: 3960692 (1976-06-01), Weyl et al.
patent: 3960693 (1976-06-01), Weyl et al.
patent: 3981785 (1976-09-01), Sandler
patent: 4029472 (1977-06-01), Micheli et al.
patent: 4076608 (1978-02-01), Fujishiro et al.

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