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.EC: Support 3-point calibration automatic identification (1413us 12.88ms and 111.8ms)Built-in 3 calibration points (1413uS/cm 12.88ms /cm 111.8ms /cm)PH:1 point (6.86) or 2 point (6.86 4.00) (6.86 9.18) or 3 point (6.86 4.00 9.18) can automatically identify the calibration solution.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.Has automatic temperature compensation.5 minutes no operation, the meter will automatically shut down. Save power, extend battery life. (Battery is not included)With backlight function, it is more convenient to read.Specifications:Material: ABSEC:?Measuring range: 0 to10000uS/cm 10.01-19.99ms 20.1-400ms /cmResolution: 1uS/cm; 0.1 mS/cm;Accuracy: +/-2% of the readingTDS:?Measurement range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0 PPTResolution: 1ppm; 0.1 PPTAccuracy: +/-2% of the readingSalinity:?Resolution: 0.01%Accuracy: 0.01-5.00% (+/-0.1%) 5.10-25.00% (+/-1%)PH:Measuring range: 0.01-14.00pHResolution: 0.01pHAccuracy: +/-0.05pHOperating environment: 0 to 60.0 celsius (32.0-140 Fahrenheit ); RH 100%TDS factor: 0.4 to 1.0Temperature range: 0.1-60.0 celsius 32.0-140 Fahrenheit Temperature accuracy: +/-0.5 celsius Temperature resolution: 0.1 celsius / Fahrenheit Battery: 3 * LR44 (not included)Waterproof rating: IP67Display size: 33*24mmItem size: 180 * 37mm / 7.1 * 1.5inItem weight: 86g / 3.0ouncePackage size: 183 * 37 * 37mm / 7.2 * 1.5 * 1.5inPackage weight: 90g / 3.2ouncePacking List:1 * Water Quality Monitor Tester3 * PH Buffer Powders