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  1. M

    Digital TDS & PH Meter's

    Go for digital with replaceable glass electrode.
  2. M

    Calibrating a PH Meter?

    For the outline of the calibration procedure see http://www.ph-meter.info/pH-electrode-calibration Note that details may vary from device to device. If your pH meter has only one screw for calibration it can be impossible to calibrate it properly, as in general this is two point...
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