Product Name: Digital Dm-2 Commercial in-Line Dual TDS Monitor Ideal for Reverse Osmosis (RO) Deionized Water (DI) Filtration Systems and More Model NO.: DM-2 Type: TDS Inline Dual Monitor Certification: RoHS, FCC, CE Portable: Inline Monitor Appliance: Food Analysis, Medical Research, Biochemistry, Hydroponics Aquariums Drinking and More Display: Digital Power Source: 2 X 1.5V AA Alkaline Batteries Included Re-Calibration: Can Be Done Separately for Each Line Transport Package: Carton Packing Specification: 11.6 x 6.8 x1.8 cm (4.6 x 2.6 x. 7in. ) Origin: China HS Code: 84219910 Product Description DM-2DM-2: Commercial In-Line Dual TDS MonitorThe DM-2 is a commercial grade monitor measuring TDS feed (input) water vs. product (output) water of a water filtration system at any time. With its shielded cables and diagnostic messaging this robust device is ideal for Reverse Osmosis (RO), Deionized water (DI) filtration systems that work well in applications such as drinking or potable water, Water treatment, Aquariums, Hydroponics and many more.FEATURES:Highly efficient and accurate due to its advanced microprocessor technologyDisplays TDS levels of the Feed Water and Product Water with in & out electrode probesAuto-Off function conserves battery power (Shuts off automatically after 3 minutes)Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. The DM-2 features digital calibration.Diagnostic error messagingShielded sensor cablesComes equipped with two 1/4 inch T-fittings (Also available with 3/8″ or 1/2″ fittings)Product DescriptionRange: 0-9990 ppm Dual Range - Measures from 0-999 ppm, with a resolution of 1 ppm. From 1000 to 9990 ppm, the resolution is in 10 ppm increments, indicated by a blinking 'x10' image.Accuracy: ±2%Conversion Factor: NaCl (avg. 0.5)Cable Length: 46″ (including sensor), shielded cablesSensor: Dual, 1/4″ diameter for quick-connect fittings (model SP-3, included)Digital Calibration: Digitally factory calibrated to NaCl 342 ppm. Re-calibration can be done separately for each line.Power source: 2 x AA batteries (included)Battery life: Approx. 2 yearsSize: 11.6 x 6.8 x1.8 cm (4.6 x 2.6 x .7in.)Weight: 201.3 g (7.1 oz.)Differences from the DM-1:Designed for commercial/industrial applicationsStronger, water-resistant casingDigital calibration can be done individually on each line.Improved design, including an extra-large, easy-to-read LCD displayLonger, waterproof, shielded cablesVariable mounting bracketApplication: Aquaculture, Aquarium, Drinking Water, Food & Beverage, Hydroponics, Industrial, Water Treatment, Window Cleaning/CarwashMore Choices: