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4-in-1 RO Water Filter Purity Tester TDS EC Meter Temperature Water Electrolyser with Electrolysis Apparatus Tool Hydro tester for Measuring & Testing of Water Quality. This Digital Meter Is a Combination of Tds Meter (Total Dissolved Solids) and Ec Meter (Electrical Conductivity). 3 in 1 Tds Tester Ec Meter Shift Between Tds & Conductivity and Temperature. Specifications: Tds: 0-9990 Ppm (Parts Per Million) Conductivity: 0-9990 µS/cm Degrees Celsius: 0.1-80.0°c Fahrenheit: 32.0-176.0°f Accuracy: ±2% Battery: 1 * 3v Cr2032 Button Battery (Included) Item Weight: 51g, Item Size: 15.4 X 3.0 X 1.4cm. RO Water Purity Tester Water Electrolyzer Water Quality TDS Meter Electrolyser. Show the different color between RO Pure Water and Tap Water. Color Tester: Show the color of Water quality. Results: R/O Water show only a little yellow & clear. Tap Water (city water) show black & dirty. Specification: Power: 220V. (PLEASE NOTE: BARS PROVIDED WITH THE PACKAGE CAN BE RUSTY).