Widely used in aquarium, glass fishpond, pharmaceutical research, agriculture, laboratory, water environment, quality control and other fields. 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 size: 183 * 37 * 37mm / 7.2 * 1.5 * 1.5in Package weight: 90g / 3.2ounce Packing List: 1 * Water Quality Tester 3 * PH Buffer Powders