delivering longer probe life

Families committed to long-term fluoride-free water

Whether you’re setting up a new pH meter

The yellow color-coded cap makes it easy to identify pH 7

Gently stir and allow to equilibrate

HM Digital SM-1 In-Line TDS Monitor - Digital Water Quality Tester 0-9990 ppm chlorine filter delivering longer probe lifeSM 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. FEATURES: 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