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Electrochemical gas sensor

  • US 6,176,989 B1
  • Filed: 12/28/1998
  • Issued: 01/23/2001
  • Est. Priority Date: 12/28/1998
  • Status: Expired due to Term
First Claim
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1. An electrochemical oxygen sensor comprising:

  • a body having a cavity;

    an electrolyte in said cavity;

    an auxiliary electrode in contact with said electrolyte;

    a sensing electrode in contact with said electrolyte;

    a porous carbon blocking electrode positioned intermediate said auxiliary electrode and said sensing electrode and having a thickness of at least 0.5 cm in a direction in which said auxiliary electrode is separated from said sensing electrode, said blocking electrode reducing electroactive materials within said electrolyte; and

    a reference electrode in contact with said electrolyte and positioned intermediate said auxiliary electrode and said sensing electrode, said reference electrode comprising a material including silver.

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