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Description Professional TDS Meter, TDS EC Meter and Temperature Meter Total Dissolved Solids (TDS) meter is an inexpensive and convenient digital tool to instantly check your overall water quality, which will be displayed on the screen in ppm (parts per million) It is a great tool for testing drinking water, water filtration and purification, hydroponics (test your nutrients), aquariums, RO/DI systems, pools and spas, and more. Specification: Range: 0-9990ppm (The temperature is within 0-50 degrees) Temperature range: 0-99°C or 32-212°F Accuracy: ±2% Battery life: more than a year Auto-off time: 2 min Size: 6.3*1.5*0.6in Weight: 2.3 oz Package Include: 1x TDS Meter 1x User Manual Note: 1、The battery is removable and replaceable. If you want to remove or replace it, please press and hold the base of the battery avoiding the damage of the main body 2、Dry with dry cloth in order to use next time without any influence