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Diffusion-type sensor cell containing sensing and counter electrodes in intimate contact with the same side of a proton-conducting membrane and method of use

  • US 4,820,386 A
  • Filed: 02/03/1988
  • Issued: 04/11/1989
  • Est. Priority Date: 02/03/1988
  • Status: Expired due to Term
First Claim
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1. A diffusion-type gas sensor cell for quantitatively detecting a gas in a fluid medium comprising a proton-conducting solid polymer electrolyte membrane, a sensing electrode in contact with a first surface of said membrane;

  • a counter electrode in contact with the same surface of said membrane as said sensing electrode, and a reference electrode in contact with said membrane;

    an electronic circuit means coupling said sensing, reference and counter electrodes for maintaining the potentials at said electrodes at predetermined levels; and

    means for measuring the current flow between said counter and sensing electrodes as a function of the concentration of a gas being detected in a fluid medium.

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