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Device for the polarographic measurement of oxygen pressure

  • US 3,985,633 A
  • Filed: 04/14/1975
  • Issued: 10/12/1976
  • Est. Priority Date: 11/11/1972
  • Status: Expired due to Term
First Claim
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1. A device for the polarographic measurement of the partial pressure of oxygen in a sample, comprising an anodic reference electrode, means for positioning the device on the sample including a plurality of cathodic sensor electrodes each having oxygen-sensing end portions at spaced locations in a common plane for detecting the presence of oxygen diffused from the sample at each of said spaced locations, means for measuring the quantity of oxygen diffused from the sample including a cathodic measuring electrode having an oxygen-measuring end portion located inwardly of said plane, means for covering said electrodes including an oxygen-permeable membrane having a thickness which tends to slow the oxygen flow from the sample towards said measuring electrode so that the latter measures the partial pressure of oxygen, means connected between said anodic reference electrode and said sensor electrodes for monitoring the oxygen flow towards each of said spaced oxygen-sensing end portions so as to determine the proper application of said membrane on the sample, and means connected between said anodic reference electrode and said measuring electrode for indicating the partial pressure of oxygen in the sample.

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