HM Digital

The Holland Forge range of HM Digital measuring pens include the PH-200, EC-3 and TDS-3. They are very reliable and competitively priced.

 

HM Digital PH Waterproof Meter

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PH-200 Meter
PH-200

 

        • Measures pH & Temperature
        • 3 Point push button calibration
        • 1 year warranty
        • robust waterproof housing
        • replacement electrode available

 

  PH-200 User Guide (pdf)

HM Digital EC Meter

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EC-3 Meter
EC-3

 

        • easy to read display
        • measures EC
        • includes carry case with belt clip
        • highly efficient and accurate
        • hold function with auto off
        • built in digital thermomenter

 

  EC-3 Instructions (pdf)

HM Digital TDS Meter

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TDS-3 Meter
TDS-3

 

        • easy to read display
        • measures ppm
        • includes carry case with belt clip
        • highly efficient and accurate
        • hold function with auto off
        • built in digital thermometer

 

  TDS-3 Instructions (pdf)

Meter Batteries

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Meter Batteries
675 Hearing Aid Batteries
  • 1.4 volt
  • Zinc-Air Battery

6 batteries per pack. Suits all HM Digital pens above.