Micro fuel-cell oxygen gas sensor

Chemistry: electrical and wave energy – Apparatus – Electrolytic

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Details

204432, 204409, 204431, 204258, 204265, 204266, 204277, 204278, G01A 2726

Patent

active

052562735

ABSTRACT:
An oxygen sensor for measuring oxygen in the ppb range. The sensor comprises an electrochemical cell. The oxygen is metered to the cathode based on gaseous phase diffusion to provide a measurement proportional to volumetric concentration. Hydrogen is metered to the anode in an amount in excess of the oxygen being reduced at the cathode. A current is generated which is linear to the volumetric concentration of the oxygen in the sample gas. The concentration of the oxygen is measured based on current generated.

REFERENCES:
patent: Re31914 (1985-06-01), Oswin et al.
patent: 3149921 (1964-09-01), Warner
patent: 3929587 (1975-12-01), Gallagher
patent: 4960497 (1990-10-01), Gallagher

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