HM Digital SM-1 In-Line Single TDS Monitor, 1/4″ Tee, SM1Authorized HM Digital Distributor – Brand new meter with One-Year Warranty.Check out more HM Digital Products (Click Here) FEATURES Displays TDS level of a single water line. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Wide Range 0-9990 ppm (From 0 – 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking ‘x10’ image.) Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. Comes equipped with John Guest Quick-Connect T-fitting (1/4 inch standard). Installs quickly and easily. NEW PRODUCT! Measure the product water at any time. Use the monitor to determine when the filters need to be changed. Ideal for any water filtration system, including reverse osmosis systems, coolers and much more. SPECIFICATIONS Range: 0-9990 ppm Accuracy: ±2% 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 (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.) Looking for other HM Digital Meters/Monitors/Tee Fittings? Check out the HM Digital Meters (Click Here), Best-Price-Anywhere Guaranty!