Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
-Works really well, very precise
-Also has temperature and humidity sensor
-Auto turn-off saves batteries
-Calibrate it using a buffer solution (Not included) or distilled water at pH 7.0-7.1pH
-You HAVE to calibrate it every time you use it. Otherwise, you will get bad readings (not really a con, says it in the manual)
-Open it slowly so the electrical connections don't get damaged
-The last pH digit is useless, because the precision it's just +-0.1 PH, so just dont pay attention to it
Its a really good tester, looks very professional and works very well. Only for liquids.
You HAVE to buy a buffer solution for calibration ad calibrate every time you use it.
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