Method for measuring free oxygen in a combustible atmosphere

Details Method for measuring free oxygen in a combustible atmosphere Method for measuring free oxygen in a combustible atmosphere

1987-10-16

1989-05-30

Lacey, David L.

Chemistry: analytical and immunological testing

Oxygen containing

Molecular oxygen

436143, 422 94, 422 98, G01N 3322

Patent

active

048351083

ABSTRACT:
A detector for measuring free oxygen at ambient temperature in a combustible atmosphere which may be hazardous constructed as a differential thermocouple pair with the first thermocouple junction coated with a catalyst and the second thermocouple junction coated with a non-catalyst. Free oxygen in the combustible atmosphere reacts with the catalyst to liberate heat and thereby raise the temperature of the catalyst coated junction above that of the non-catalyst coated junction. Thus, the increase in temperature of the first thermocouple above that of the second thermocouple is indicative of the free oxygen in the combustible atmosphere.

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