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    • HM Digital

    • PH Pen ph80s
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      HM Digital

      PH Pen ph80s

      Digital pH PenMeasures pH and TemperatureOne-touch automatic digital calibrationWater resistantSimultaneous temperature displayBatteries ‏ : ‎ 3 LR44 batteries included

      $68.95
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    • PH-200 HM Digital Pen
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      HM Digital

      PH-200 HM Digital Pen

      Digital pH-200 Pen pH (potential of hydrogen) is an indication of a substance's acid or alkaline properties.  The higher the pH, the more base it is, and the lower the pH, the more acidic it is...

      $129.95
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