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Thread: pH Meter
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Old 11-22-2012, 01:50 AM   #2
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I have a cheap-o one I calibrate it with 7.01 solution. It seems pretty accurate. I have tested it against API tests and the same results. Mine has a problem with the digital read out, the last 2 are missing unless you squeeze it just right. So if the pH is reading 7.1 you would not see the 1 at all. I don't trust it but for daily testing it is close enough and in my opinion as reliable as most multi test strips I have tried. Try calibrating it with only the 7 lab grade since hopefully you will not need it to be accurate below 5. See if that works.
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