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HM Digital Dual TDS Monitor (DM-3)
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HM Digital Dual TDS Monitor (DM-3)


The DM-3 is a commercial-grade TDS monitor measuring TDS feed (input) water vs. product (output) water of a water filtration system at any time. DM-3 has a large backlit screen that you will be able to see the readings in dark environments. With its shielded cables and diagnostic messaging this robust device is ideal for Reverse Osmosis (RO), Deionized water (DI) filtration systems that work well in applications such as drinking or potable water, Water treatment, Aquariums, Hydroponics, and many more.

  • Highly efficient and accurate due to its advanced microprocessor technology
  • Displays TDS levels of the Feed Water and Product Water with in & out electrode probes
  • Auto-Off function conserves battery power (Shuts off automatically after 3 minutes)
  • Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution; the DM-3 features digital calibration
  • Diagnostic error messaging
  • Shielded sensor cables
  • Comes equipped with two 1/4 inch T-fittings
  • Range:
    • EC: 0~9999μS/0~9.99mS
    • TDS: 0~5000ppm/ 0~5ppt
  • Resolution:
    • EC:
      • 0.1μS (0~99.9)
      • 1μS (100~999)
      • 10μS (1000~9990)
      • 0.01mS (0.00~9.99)
    • TDS:
      • 0.1ppm (0~99.9)
      • 1ppm (100~999)
      • 10ppm (1000~5000)
      • 0.01 ppt (0.00~5.00)

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HGC720921 - HM Digital Dual TDS Monitor (DM-3)
Upc: 891155002717 10891155002714
Quantity: 1200
Volume (cf): 0.040 0.000
Dim Weight (in3/lb): 0.501 643808.633
Weight (lb): 0.630 0.000
Length (in): 8.660 1400.000
Width (in): 5.120 1100.000
Height (in): 1.570 58.110
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