A. Electrochemical Sensors: Analyzers of this type determine the oxygen content of a gas mixture by measuring the output of an electrochemical cell. B. Oxygen diffuses through a membrane into the cell and current flows between two special electrodes separated by a liquid or gel electrolyte. C. The current flow is related to the oxygen concentration in the sample and the scale is arranged to give a direct indication of oxygen content. D. The analyzer readings are directly proportional to the pressure in the measuring cell, and only small errors are caused by normal variations in atmospheric pressure. « Previous Next »
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