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Oxygen concentration sensor

  • US 4,362,609 A
  • Filed: 03/23/1981
  • Issued: 12/07/1982
  • Est. Priority Date: 05/29/1980
  • Status: Expired due to Term
First Claim
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1. An oxygen concentration sensor comprising:

  • a solid electrolyte member including two portions, one portion being exposed to a gas of interest and the other portion being exposed to the atmosphere;

    an inner cover member formed with a first space communicating portion arranged to communicate with said other portion of said solid electrolyte member;

    a water-proof cover member enclosing said inner cover member and defining with said inner cover member a ventilating passage, said water-proof cover member being formed with a second space communicating portion for maintaining the first space communicating portion of said inner cover member in communication with the atmosphere through said ventilating passage, said second space communicating portion of said water-proof cover member being axially spaced apart from said first space communicating portion of said inner cover member; and

    means, disposed in said ventilating passage between said first and second space communicating portions and spaced axially from said first space communicating portion, for impeding the flow of water through said ventilating passage.

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