Use of the Junction Between Two Solid Electrolytes for the Potentiometric Measurement of Gaseous Oxides

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Abstract
The contact between two solid electrolytes such as a stabilized zirconia and potassium sulfate can be used to measure the activity of volatile oxides, or for instance. On this basis, a new type of sensor has been designed which produces stable voltages logarithmically dependent on the concentration of the gas to be measured. This principle was extended to the measurement of other gaseous oxides, namely carbon oxides, using as the electrolyte. The range of these sensors covers a few parts per million to several thousand parts per million and their operating temperature varies from 600° to 900°C.

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