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Oxygen sensor

  • US 4,450,065 A
  • Filed: 07/26/1982
  • Issued: 05/22/1984
  • Est. Priority Date: 03/09/1982
  • Status: Expired due to Term
First Claim
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1. An oxygen sensor, comprising an oxygen pump element having a first oxygen-ion-conductive solid electrolyte board with electrode layers attached to opposite surfaces at one end of the first board, an oxygen concentration cell element having a second oxygen-ion-conductive solid electrolyte board with electrode layers attached to opposite surfaces at one end of the second board, and a means for coupling said oxygen pump element and said oxygen concentration cell element in parallel to each other with a gap between the electrode layers attached to the opposing surfaces of the first board and the second board, the edges of said gap being open to the surrounding atmosphere along at least three sides thereof, whereby said oxygen concentration cell element generates electromotive force caused by the difference between oxygen concentration in said gap and oxygen concentration of a gas surrounding the outside of the oxygen sensor while said oxygen pump element performs oxygen transportation therethrough from said gap to the outside of the oxygen sensor or vice versa to cause said oxygen concentration difference therebetween.

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