Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Erosion
Patent
1974-09-12
1977-03-15
Corbin, John K.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Erosion
23232E, 23254E, G01N 2712, G01N 2714
Patent
active
040126927
ABSTRACT:
The concentration of one or more gaseous components of a mixture of gases is determined using a metallic oxide semiconductor the electrical resistance of which changes in the presence of reducing gases. The speed of reaction, relative to the speed of sorption and desorption, of different gases with the semiconductor varies at different temperatures. Since the speed of reaction of a hydrocarbon is substantially lower at certain temperatures than the speed of reaction of carbon monoxide, carbon monoxide can be indicated at those temperatures while, the variation in resistance determined by hydrocarbons is negligibly small.
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Corbin John K.
Punter Wm. H.
Westfalische Berggewerkschaftskasse
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