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HM Digital DM-3 Inline Dual TDS/EC Monitor Meter, Upgraded DM-2 DM-2EC

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$51.90

$ 22 .99 $22.99

In Stock
  • 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
  • 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 (Also available with 3/8″ or 1/2″ 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)
  • Accuracy: ±2% Conversion Factor: NaCl (avg. 0.5) Cable Length: 1.2m /3.9ft, shielded cables Sensor: Dual, 1/4″ diameter for quick-connect fittings (model SP-3, included) Digital Calibration: Digitally factory calibrated to NaCl 342 ppm. Re-calibration can be done separately for each line. Power Source: 2 x AA batteries (included) Size: 11.6 x 1.9 x 7.0 cm (4.6 x 0.7 x 2.8 in) Weight: 225 g (7.9 oz.)


The DM-3 is a commercial-grade EC/TDS monitor measuring EC/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