Oxygen measuring apparatus and method with automatic temperature

Details Oxygen measuring apparatus and method with automatic temperature Oxygen measuring apparatus and method with automatic temperature

1987-06-23

1988-11-15

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204408, 204427, 204428, G01N 2758

Patent

active

047847280

ABSTRACT:
During the measurement of oxygen content of a gas with a solid electrolyte material capable of oxygen ion conductivity the electrolyte is heated to maintain a constant control temperature. If the ambient temperature changes, an offset or error is introduced into the oxygen measurement. An apparatus and method is provided to automatically compensate for any such offset. Thermocouple means are provided in series with the electrolyte circuit so that a thermal emf if generated due to any differential between ambient and control temperatures. The thermocouples are arranged to generate a net thermal emf which opposes the emf generated by the electrolyte by an amount which automatically compensates for any offset due to the temperature differential. If the ambient and control temperatures are the same, there will be no offset and no net thermal emf.

REFERENCES:
patent: 3347767 (1967-10-01), Hickam
patent: 3859192 (1975-01-01), Barnes et al.
patent: 3865707 (1975-02-01), Sayles
patent: 4284487 (1981-08-01), Barnes et al.
patent: 4659435 (1987-04-01), Brothers et al.

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