1.1 This test method covers the continuous determination of pH of water by electrometric measurement using the glass, the antimony or the ion-selective field-effect transistor (ISFET) electrode as the sensor.
1.2 This test method does not cover measurement of samples with less than 100 S/cm conductivity. Refer to Test Method D 5128.
1.3 This test method does not cover laboratory or grab sample measurement of pH. Refer to Test Method D 1293.
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