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Digital Pen Type Waterproof PH & Conductivity Meter Pocket Portable PH & Cond Meter Range 0~14.0pH 0~199.9uS/cm Water Analyzer

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High-precision pen-type PH meter, portable pH meter PH value tester, pH pen waterproof pen, free shipping

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pH meter

pH meter. As it was signalled before, pH meter is nothing else, but precise voltmeter, that measures EMF of the pH electrode. However, most commercially available voltmeters will be of no use. pH electrode has internal resistance in the range of 10-100 MΩ.

pH meter - Wikipedia

A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. The pH meter measures the difference in electrical potential between a pH electrode and a reference electrode, and so the pH meter is sometimes referred to as a "potentiometric pH meter".

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