Product Name: Digital Dm-1 Commercial in-Line TDS Monitor Ideal for Reverse Osmosis (RO) Deionized Water (DI) Filtration Systems and More Model NO.: DM-1 Type: TDS Inline 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 Button Cell Batteries (Included) (Lr44 ) Re-Calibration: Meters Can Be Recalibrated with a Mini-Screwdriver Transport Package: Carton Packing Specification: 7.6 x 2 x 4.7 cm (3 x. 8 x 1.9 in. ) Origin: China HS Code: 84219910 Product Description DM-1DM-1: In-Line Dual TDS MonitorThe DM-1 is consumer friendly monitor measuring feed (input) water vs. product (output) water of a water filtration system at any time. This device is ideal for Reverse Osmosis (RO), Deionized water (DI) filtration systems that work well in variety of application such as drinking or potable water, Aquariums, Hydroponics and many more.FEATURES:Displays TDS levels feed water and product water with in & out electrode probesEfficient and accurate with advanced microprocessor technologyAuto-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 two 1/4 inch T-fittings (also available in 3/8″ and 1/2″)Installs quickly and easilyProduct DescriptionRange: 0-9990 ppm Dual 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.)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 useSize: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.)Weight: 79.4 g (2.8 oz.)Application: Aquaculture, Aquarium, Drinking Water, Food & Beverage, Hydroponics, Water Treatment, Window Cleaning/CarwashMore Choices: