Testing TDS meter for Accuracy - The Planted Tank Forum
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post #1 of 5 (permalink) Old 03-05-2020, 01:24 PM Thread Starter
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Testing TDS meter for Accuracy

Is there any kind of liquid that we can test TDS meter from time to time for accuracy? if so , please note Brand/Model and where we can acquire it. The reason i ask because i just bought an Apera PH/TDS meter and compare it to my current cheap one is WAYYYYYY different. Therefore, i am looking for the way to test TDS meter for accuracy.

Thanks In Advance.
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post #2 of 5 (permalink) Old 03-05-2020, 01:48 PM
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HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume https://www.amazon.com/dp/B001VE99X8..._QeryEbZ6C5H40
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post #3 of 5 (permalink) Old 03-05-2020, 06:20 PM Thread Starter
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Quote:
Originally Posted by EdWiser View Post
HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume https://www.amazon.com/dp/B001VE99X8..._QeryEbZ6C5H40
Thanks Edwiser, beside calibration is there any other liquid such as distill water to test the meter after that or some sort of comparison to determine the meter is accurate?
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post #4 of 5 (permalink) Old 03-05-2020, 10:22 PM
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Itís best to use the calibrated liquid as you actually know it is a set value.

Sort of like Ph calibration liquid you know it is a specific PH.
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post #5 of 5 (permalink) Old 03-27-2020, 08:57 PM
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Pure distilled (RO/DI) water should show exactly 0 TDS, combined with the test solution of a specific value that another user suggested, you should understand how good your probe is.
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