How to measure the pH of pure water with a regular pH tester?
Modified on: Tue, Aug 30, 2022 at 6:29 AM
Using a regular pH tester like Apera PH20 and PH60 to test pure water like tap water, drinking water, RO water, distilled, and deionized water could be a challenge. It will typically take much longer for the readings to get fully stabilized (typically 1-5 minutes). Please be patient.
If it's not working, try adding Apera 3M KCL (AI1107) to your pure water at the ratio of 1:1000 (e.g. 1 ml KCL to 1000 ml water) to accelerate stabilization while minimizing pH change.
If the accuracy is not meeting your requirement, a pH meter with a specialized pH electrode designed for pure water test such as PH850-PW or PH8500-PW would be the better choice.
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