Combination electrode having extended reference chamber
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United States of America Patent
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Aug 27, 2024
Grant Date -
Sep 30, 2021
app pub date -
Jun 11, 2021
filing date -
Dec 13, 2018
priority date (Note) -
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Abstract
A pH combination electrode includes inner and outer tubes, working and reference electrodes, and a hydrogel diaphragm between the tubes. A seal is disposed inside the inner tube closer to a first inner tube end than to the second inner tube end. An extended reference chamber is formed inside the inner tube between the seal and the second inner tube end. A first conductive fluid is contained in the inner tube between the seal and the first inner tube end. A second conductive fluid is contained in the extended reference chamber and in a reference chamber formed between the inner and outer tubes. A through-hole in the inner tube allows the second conductive fluid to flow between the reference chamber and the extended reference chamber. The working electrode extends into the inner tube, through the seal and into the first conductive fluid. The reference electrode contacts the second conductive fluid.
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