Abstract
AbstractAn oxygen probe is developed, using the principle of the silver‐lead galvanic cell, covered with a plastic membrane. It is steam sterilizable while filled with water; after sterilization, water is easily exchanged for the electrolyte, potassium bicarbonate. Flat plastic membranes up to a thickness of about 0.1 mm can be applied. The membrane is secured and stretched in a special way, which guarantees a leakproof seal. The outer shape of the probe has a tulip‐form and consists of polished stainless steel, except for the electrode face. The electrode is suitable for laboratory and industrial use and its components are completely standardized.Almost linear response for O2‐partial pressures up to atmospheric is obtained with 0.001 in. and 0.002 in. FEP‐Teflon membranes. 90% response time is of the order of 10–15 sec for the 0.001 in. membrane, Residual current is almost negligible (< 1 μA).
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