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Gas sensor

  • US 4,938,928 A
  • Filed: 01/30/1989
  • Issued: 07/03/1990
  • Est. Priority Date: 10/28/1986
  • Status: Expired due to Fees
First Claim
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1. A gas sensor consisting essentially of:

  • at least three planar metal outer electrodes;

    a wire metal heat generating member connected to and supported by two of the three planar metal outer electrodes;

    a heat resistant insulating coating formed on the wire metal heat generating member;

    a gas-sensitive layer formed on the heat resistant insulating coating, electrical characteristics of the gas-sensitive layer changing with changes in an environmental gas to be sensed; and

    at least one detecting electrode formed at a position selected from the group consisting essentially of the heat resistant insulating coating and the gas-sensitive layer, and said at least one detecting electrode connected to the gas-sensitive layer and directly connected to the remaining planar metal outer electrode.

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