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HM Digital DM-1: In-Line Dual TDS Meter

FM-2: Filter Monitor | DM-2: Dual TDS Monitor 2 | SM-1: Single Line TDS Monitor
HM Digital DM-1: In-Line Dual TDS Meter

Measure the tap water coming in vs. the purified water going out of your water filtration system at any time. Install on systems such as aquarium r/o systems, window cleaning systems, measure tds in and out of r/o.

  • Displays TDS levels of the feed water and product water with in & out electrode probes
  • Highly efficient and accurate due to its advanced microprocessor technology
  • Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use
  • Dual Range 0-9990 ppm (From 0 - 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image)
  • Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver
  • Comes equipped with John Guest Quick-Connect T-fittings as shown
  • Installs quickly and easily.

Range: 0-9990 ppm
Accuracy: ±2%
Conversion Factor: NaCl (avg. 0.5)
Cable Length: 24.5" (including sensor)
Fittings: 1/4" standard, also available with 3/8" or 1/2"
Power source: 2 x 1.5V button cell batteries (included)
Battery life: approx. 1000 hours of continuous use
Size: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.)
Weight: 79.4 g (2.8 oz.) 

  • These prices include delivery to the UK

    Please select a fitting size:

    With 1/4" fittings - £17.87 + vat (£21.44) each:

    With 3/8" fittings - £19.58 + vat (£23.50) each:

    With 1/2" fittings - £24.00 + vat (£28.80) each:
    Does not include 1/2" stem
  • This product will be dispatched by Royal Mail 1st Class service. Bulk orders will be shipped by courier service.

    Order before 4pm for same day dispatch (weekdays only)

    Courier orders will be dispatched same day if ordered before 3pm (weekdays only)