Probe for measuring oxygen partial pressure in a gas atmosphere

Details Probe for measuring oxygen partial pressure in a gas atmosphere Probe for measuring oxygen partial pressure in a gas atmosphere

1985-08-23

1986-06-03

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204427, 204428, G01N 2746

Patent

active

045928258

ABSTRACT:
The probe comprises an outer casing communicating through apertures with the atmosphere of a furnace and bearing a support part on which the measuring electrode, or anode, is wound. A tablet of solid electrolyte in contact with the anode can be easily and quickly replaced when the measuring face thereof has become contaminated by the furnace atmosphere. The reference electrode, or cathode, is formed by the soldered junction and one of the wires of a thermocouple, the two conductors of which are crumpled into a hollow in the reference face of the tablet, then pass through a conduit of insulating refractory material. Between the bottom of the casing and that of a tubular support accommodated therein there is a spring which has the effect of pressing the tablet against a washer via the supporting part, thus sealing the furnace atmosphere from a reference atmosphere. The reference atmosphere is maintained by a flow of air or oxygen injected into the conduit and sweeping the wires of the thermocouple, exiting again within the tubular support.

REFERENCES:
patent: 3454486 (1969-07-01), Davies
patent: 4040930 (1977-08-01), Dillon
patent: 4186072 (1980-01-01), Blumenthal et al.
patent: 4305803 (1981-12-01), Beyer et al.
patent: 4419212 (1983-12-01), Dietz et al.
Horsley "AERE Report R-3427", 1961, p. 3 & FIG. 2.
Braunshtein, D., et al., "A Sample Holder for Fuel Cell Measurements at High Temperature," J. Phys. E: Sci. Instrum., vol. 12, No. 10, 10/79, pp. 921-922.

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