[5 in 1 ] 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. [ measurement]: In order to achieve high accuracy, it is equipped with high quality t ium 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]: 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 : 2% of reading Tds test range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt Resolution: 1ppm; 0.1 ppt : 2% of reading ity measurement range: 0.00 to 25.00% Resolution: 0.01% : 0.01-5.00% (0.1%) 5.10-25.00% (1%) pH test range: 0.01-14.00 pH Resolution: 0.01 pH : 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 : 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 consumption: 2.9mA, power consumption is 0 when off is relatively accurate within 150 ppt, and the deviation above 160 ppt is relatively large. Note : each use, be sure to clean the electrode Package List: 1 water quality test pen.