Apparatus for measurement of oxygen concentration

Details Apparatus for measurement of oxygen concentration Apparatus for measurement of oxygen concentration

1979-02-16

1980-06-10

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

G01N 2758

Patent

active

042071593

ABSTRACT:
An apparatus comprising a probe having an oxygen ion conductive solid electrolyte layer, a potentiometer and a DC power source connected to the probe. The probe comprises a porous and electronically conductive reference electrode layer on one side of the solid electrolyte layer, a similar measurement electrode layer on the other side of the electrolyte layer and a separation layer of an inactive material on the outer side of the reference electrode layer. The separation layer or the solid electrolyte layer, or both, has a porous structure and is formed such that the reference electrode communicates with an exterior atmosphere only through this porous structure, while either the separation layer or the electrolyte layer serves as a substrate of the probe. During measurement, the DC power source keeps a current flowing through the electrolyte layer between the two electrode layers to maintain a reference oxygen partial pressure at the interface between the electrolyte layer and the reference electrode layer.

REFERENCES:
patent: 3691023 (1972-09-01), Ruka et al.
patent: 4021326 (1977-05-01), Pollner et al.
patent: 4045319 (1977-08-01), Deportes et al.
patent: 4107019 (1978-08-01), Takao et al.
patent: 4126532 (1978-11-01), Takao et al.
patent: 4134818 (1979-01-01), Pebler et al.

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