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4.75 out of 5
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  • 08/07/2022

    Fast delivery. pH tester with included reference powder.

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  • 12/03/2022

    it works well, came with storage box and complete tesrs

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  • 10/08/2019

    ottimo

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  • 07/06/2022

    Until now it works fine. If you haven't use it for long time , it needs to be inserted into distilled water for a while to have right readings.

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  • 23/02/2022

    Well packaged. Came with 3 powders to prepare buffer solutions for calibration. Works well.

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  • 04/03/2022

    ok

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  • 12/01/2022

    It is nice!

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  • 07/04/2022

    Hi, I have a calibration issue with my TVIRD ph Meter. The users manual tells I have to push the CAL button for 5 seconds, then immerse the electrode into the 6.86 solution, then wait while 6.86 flashes 3 times. However, my ph meter randomly flashes 4.00 or 6.86 in these cases. Also, I tried to push again quicly the CAL button after the 5 seconds once or twice to change calibration mode to 4.00 or 9.18, as it is described in the users manual, but nothing happens. It flahses always 4.00... Please help what is wrong. Regards, Zsolt

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  • 28/04/2022

    Totally useless , never worked as a PH meter , only temperature is working

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  • 15/06/2021

    Well packaged, arrived complete. First tests seem to work well both ph and temperature.

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