5 in 1 Water Quality Test:The pH meter is designed with 5 in 1 function, which can measure PH, TDS, EC, salinity and temperature simultaneously with high accuracy. Omnidirectional water quality measurement to ensure the health of water quality. Accurate measurement: In order to achieve high accuracy, it is equipped with high quality titanium alloy probe and reliable automatic temperature compensation (ATC), which can ensure accurate reading at different temperatures. Auto power off function:The auto power off function cuts off the power after 5 minutes without any operation to save energy. IP67 waterproof rating:IP67 is an international waterproof certification water and dust. Protection against dust intrusion, short-term immersion. Wide range of uses: This water quality detector is ideal for testing water, swimming pools, aquariums, spas, hydroponics, laboratory and drinking water etc. Product parameters Conductivity test range: 0-10,000uS/cm 10.01-19.99ms 20.1-400mS/CM Resolution: 1 S/cm; 0.1mS/cm Accuracy: 2% of reading Tds test range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt Resolution: 1ppm; 0.1 ppt Accuracy: 2% of reading Salinity measurement range: 0.00 to 25.00% Resolution: 0.01% Accuracy: 0.01-5.00% (0.1%) 5.10-25.00% (1%) pH test range: 0.01-14.00 pH Resolution: 0.01 pH Accuracy: 0.05 pH Temperature compensation: Automatic Temperature Compensation (ATC) Working Environment: 0 to 60.0C (32.0 to 140F); 100% RH TDS factor: 0.4 to 1.0 Temperature range: 0.1-60.0 32.0-140 Temperature Accuracy: 0.5 Temperature resolution: 0.1C/F Auto shut-off: 5 minutes 3x1.5LR44 Display size: 33*24mm Dimensions and weight: 183*37*37mm(7.2*1.5*1.5in)/90g(3.2oz) Display: backlight not supported Power consumption: 2.9mA, power consumption is 0 when offAccuracy is relatively accurate within 150 ppt, and the deviation above 160 ppt is relatively large. Note : After each use, be sure to clean the electrode. Package List: 1 water quality test pen.