HM Digital SM-1 Inline Single TDS Monitor
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Item #: HM-SM-1
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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 watfiltration 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 Mur-lok® Quick-Connect T-fitting (1/4 inch standard, also available in 3/8″ or 1/2″).
    Installs quickly and easily

Product Description

    Range: 0-9990 ppm: (0 – 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking ‘x10’ image.)
    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 (LR44 or equivalent; 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.)

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