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HM Digital SM-1 Single In-line TDS Meter Reverse Osmosis Water Tester

HM Digital SM-1 Single In-line TDS Meter Reverse Osmosis Water Tester

HM Digital SM-1 Single In-line TDS meter tests water quality by connecting in-line with 1/4" tubing, usually used to test input or output water from a reverse osmosis water filter system.

High quality and very accurate TDS meter for domestic or commercial use, measures PPM in the water from 0-9990ppm

Ideal as a water quality tester to test reverse osmosis water and as a tap water quality tester

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£23.99 tax incl.


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HM Digital SM-1, Single In-line TDS Meter Reverse Osmosis Water quality Meter 



This HM Digital SM-1 TDS meter can be used to test the quality of water by detecting the TDS (Total Dissolved Solids) in the water and displaying this as a reading of how many PPM (parts per million) of total dissolved solids there are in the water.

Simply connect the supplied tee fitting in-line with the water pipe to read the TDS, usually used to either monitor the incoming water to an RO system or the outgoing water, allowing you to observe the water quality.


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.



  • Can be used to measure TDS, easily connected in-line with 1/4" tubing
  • 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 (we have adapters if needed, please contact us)
  • Power saving function, automatically turns off after 10 mins of being idle
  • Battery Life 1000 hours
  • Brand HM Digital
  • Fitting Size 1/4"
  • Model SM-1
  • Product Type Single In-line TDS Meter


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