Widely used in aquarium, glass fishpond, pharmaceutical research, agriculture, laboratory, water environment, quality control and other fields.Features:Easy to use, high accurancy.Quick and easy installation and operation.This is a professional water level test instrument, the operation is simple, the appearance of fashion, small size and easy to put in your pocket.Determine PPM (parts per million), EC (conductivity), water hardness and liquids temperature.Fine for a variety of professional and domestic uses such as drinking water, hydroponics, aquariums, aquaculture, swimming pools and hot tubs, spas, car washes, food and beverages, etc.It's waterproof. You don't have to be careful when you use it.Specifications:TDS range: 0-990ppm (mg/L)Material: ABSAccuracy: +/- 2%Battery: 2 * LR44Item size: 137 * 25 * 14mm / 5.4 * 1.0 * 1.0ounceItem weight: 34g / 1.2ouncePackage size: 150 * 40 * 10mm / 5.9 * 1.6 * 0.4ouncePackage weight: 40g / 1.4ouncePacking List:1 * Water Quality Tester