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Chemical sensor for carbon monoxide detection

  • US 5,252,949 A
  • Filed: 08/28/1991
  • Issued: 10/12/1993
  • Est. Priority Date: 08/28/1991
  • Status: Expired due to Term
First Claim
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1. A sensor for detecting CO in a flowing gas stream comprising:

  • (a) a surface layer comprising Cu1+x Mn2-x O4-y, said surface layer having a surface layer resistance which changes as a function of CO concentration;

    (b) means for measuring said surface layer resistance on said surface layer;

    (c) means for determining any difference between said measured surface layer resistance in the absence of said flowing gas stream at said surface layer and in the presence of said flowing gas stream at said surface layer; and

    (d) means for relating said difference to CO concentration in said flowing gas stream.

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