Widely used in aquarium,glass fishpond,pharmaceutical research,agriculture,laboratory,water environment,quality control and other fields. ・Easy to use,high accuracy ・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: ABS ・EC: ・Measuring range: 0 to10000uS/cm 10.01-19.99ms 20.1-400ms /cm ・Resolution: 1uS/cm; 0.1 mS/cm ・Accuracy: ±2% of the reading ・TDS: ・Measurement range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0 PPT ・Resolution: 1ppm; 0.1 PPT ・Accuracy: ±2% of the reading ・Salinity: ・Resolution: 0.01% ・Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%) ・PH: ・Measuring range: 0.01-14.00pH ・Resolution: 0.01pH ・Accuracy: ±0.05pH ・Operating environment: 0 to 60.0℃ (32.0-140℉); RH 100% ・TDS factor: 0.4 to 1.0 ・Temperature range: 0.1-60.0℃ 32.0-140℉ ・Temperature accuracy: ±0.5℃ ・Temperature resolution: 0.1℃/℉ ・Battery: 3 * LR44 (not included) ・Waterproof rating: IP67 ・Display size: 33*24mm ・Item size: 180 * 37mm/7.1 * 1.5in ・Item weight: 86g/3.0ounce Package included: ・1 x Water Quality Monitor Tester ・3 x PH Buffer Powders