HM Digital SM-1 Inline Single Probe TDS Meter




SM-1: In-line Single TDS Monitor

The SM-1 is provides an easy to read single line TDS monitor that provides a digital readout. It is ideal for any water filtration system, including reverse osmosis systems, coolers and much more.


  • Displays TDS level of a single water line

  • Efficient and accurate

  • Auto-Off function conserves battery power. (Shuts off automatically after 10 minutes of non-use)

  • Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.

  • Comes equipped with one 1/4 inch T-fitting (also available in 3/8″ or 1/2″).

  • Also available without T-fitting (Model Name: SM-1WOF)

  • Installs quickly and easily

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