PH sensor and reference electrode thereof
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United States of America Patent
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Jan 2, 2024
Grant Date -
Aug 31, 2023
app pub date -
Feb 28, 2022
filing date -
Feb 28, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
A pH sensor for detecting a pH of a sample includes a reference electrode and a glass electrode. The reference electrode includes a hollow tubular housing, and at least one water absorbing unit disposed in the housing and including a porous junction member configured to contact the sample, and a water absorbing member disposed on one side of the porous junction member that is opposite to the sample. The water absorbing member is made by soaking a superabsorbent polymer in potassium chloride solution. The glass electrode is inserted into the water absorbing member, and protrudes from the junction member toward the sample.
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