4 in 1 Water Quality Monitor: Water Testing Product more than just a Salinity Meter, this Digital Water Quality Meter also used as TDS Meter, EC Meter, Temperature Meter Measurement Range: Salinity Tester measuring range 0-9999PPM, TDS Meter measuring range 0-9990PPM, EC Tester measuring range 0-9999us/cm, with an accuracy of ±2%. Auto off function for easier use, save energy High Accurate: Digital Salinity Meter for drinking water test, high sensitivity, results in seconds, accurate, LCD display screen for easy reading, has automatic temperature compensation Easy to Use: Just insert PPM Meter into water with immediate response, probes instantly response and display result Wide Application: Water Quality Tester is widely used in water treatment industry, drinking water industry, swimming pool, hot tub, spa, aquarium, saltwater pool, pond, laboratory, hydroponics, fish tank, Manufacturer: ZXZZAS