Device for the polarographic measurement of oxygen pressure
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A platinum oxygen-pressure measuring electrode is connected with a reference electrode. An indicating device for indicating the oxygen pressure is connected with both of the electrodes, and an arrangement is interposed between the electrodes and an object to be measured and has a surface which is to be placed against the object. The arrangement offers to the diffusion of oxygen from the surface to the measuring electrode a resistance which is greater than the resistance which is offered to such diffusion of the oxygen through the object to be measured.
-
Citations
9 Claims
- 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.
Specification