A pH meter is an electronic device used for measuring the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi-solid substances). A typical pH meter consists of a special measuring probe (a glass electrode) connected to an electronic meter that measures and displays the pH reading.
ORP or Oxidation Reduction Potential is commonly used in measurement of Water Disinfection. Unique ORP Waterproof Tester has a Double Junction Replaceable Electrode. Tester allows Calibration and offers highly reliable measurements.
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