HM Digital DM-1 Inline Dual TDS Meter with 1/4" Connections from Finerfilters

In stock

Product Details:

Comes equipped with Quick-Connect T-fittings.
Installs quickly and easily.

Technical Information

Range: 0-9990 ppm
Accuracy: ±2%
Conversion Factor: NaCl (avg. 0.5)
Cable Length: 24.5" (including sensor)
Fittings: 1/4" standard.
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.)

Finerfilters Inline TDS Meter 1/4"


HM Digital DM-1, Dual In-line TDS Meter Reverse Osmosis Water quality Meter

This HM Digital DM-1 TDS meter can be used to test the quality of water from two different water inputs by detecting the Total Dissolved Solids (TDS) in the water and displaying this as a reading of how many parts per million (PPM) of total dissolved solids there are in the water.
Ideal for testing the water quality of your tap water, water filter, hydroponics, agricultural water, colloidal silver, or for testing Reverse Osmosis or De-ionized water for use with dental sterilization equipment or window cleaning.

Simply connect the supplied tee fittings in-line with the water pipe to read the TDS, for example one could be connected to the incoming water to a RO system, and one to the outgoing water, allowing you to observe the difference in water quality between the two points.


  • Can be used to measure both the water TDS from Incoming tap water & outgoing purified water from the system
  • Measures TDS in the range of 0-9990
  • Designed for domestic and commercial use
  • Very accurate measurements with its on board microprocessor & is already factory calibrated
  • Fits all water filters with 1/4" tubing.
  • Battery Life 1000 hours
More Information
Product Name HM Digital DM-1 Inline Dual TDS Meter with ¼” Connections from Finerfilters
Brand/Manufacturer HM Digital
Item Type TDS Meter
Expected Lifespan 6 Months
Weight (kg) 0.090000
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