Carbon monoxide sensor having mercury doped electrodes

Details Carbon monoxide sensor having mercury doped electrodes Carbon monoxide sensor having mercury doped electrodes

1995-05-25

1997-06-03

Williams, Hezron E.

Measuring and testing

Gas analysis

Detector detail

73 2331, 73 3107, 204412, 204415, 204431, 204432, G01N 2700, G01N 2749, G01N 3300

Patent

active

056356277

ABSTRACT:
In this carbon monoxide sensor, particularly for measuring carbon monoxide in flue gases, which must be operated in a controlled-potential bias circuit and which comprises a working electrode, a counter electrode, and a reference electrode, all of platinum black, as well as an electrolyte connected with these three electrodes, the hydrogen cross-sensitivity is drastically reduced by providing two layers enriched by mercury and/or mercury ions, one on a surface of the working electrode and one of a surface of the reference electrode. These two electrodes are treated with mercury or a mercury compound before or after incorporation into the sensor.

REFERENCES:
patent: 4051006 (1977-09-01), Neti et al.
patent: 4478704 (1984-10-01), Miyoshi et al.
patent: 4642172 (1987-02-01), Fruhwald
patent: 5284566 (1994-02-01), Cuomo et al.
patent: 5331310 (1994-07-01), Stetter et al.
patent: 5466356 (1995-11-01), Schneider et al.

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