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Biological gas sensor

  • US 6,143,150 A
  • Filed: 07/03/1997
  • Issued: 11/07/2000
  • Est. Priority Date: 07/03/1996
  • Status: Expired due to Fees
First Claim
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1. A biological gas sensor comprising:

  • a sensor which has in the sensitive part thereof a bicarbonate buffer solution held by a first gas permeable membrane and detects a carbon dioxide partial pressure based on the hydrogen ion concentration of the bicarbonate buffer solution;

    a liquid holding part which has in the inside thereof the sensitive part of said sensor and at least a part of the inner wall of said holding part is made of a second gas permeable membrane;

    an aqueous solution which is held in said liquid holding part and is substantially isotonic with said bicarbonate buffer solution; and

    a metallic member which is in said liquid holding part and is reactive with hydrogen sulfide.

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