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Carbonic acid gas sensor

  • US 5,352,352 A
  • Filed: 09/23/1992
  • Issued: 10/04/1994
  • Est. Priority Date: 09/24/1991
  • Status: Expired due to Term
First Claim
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1. A carbonic acid gas sensor capable of detecting carbonic acid gas dissolved in fluid, comprising:

  • an outer plate including first and second glass substrates each having a window formed therein and fixedly sandwiching a gas permeable membrane to form a carbonic acid gas permeable window;

    a first supporting plate supporting a pH-electrode, for detecting a pH of an electrolyte, including an insulating substrate, a pH sensitive membrane formed on said substrate so as to oppose said carbonic acid gas permeable window, and a compartment for accommodating the electrolyte, said compartment extending through the thickness of said first supporting plate; and

    a second supporting plate supporting a reference electrode, wherein said outer plate, said first supporting plate and said second supporting plate are laminated.

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