5 in 1 Water Quality TesterThe PH meter adopts 5 in 1 function design, which can measure PH, TDS, EC, salinity, salinity and temperature by same time with great precision. Comprehensive water quality measurement to ensure the water quality is healthy. Precise measurement: In order to achieve high accuracy, it is equipped with a high-quality titanium alloy probe and reliable automatic temperature compensation (ATC), which guarantees accurate readings at different temperatures. [Auto power off function] The auto power off function will cut off the power after 5 minutes without any operation to save power. IP67 WaterproofIP67 is an international waterproof and dustproof certification. Prevent dust intrusion, short-term immersion. [Wide Range of Uses]: This water quality tester is perfect for testing water, swimming pools, aquariums, spas, hydroponics, laboratories and outdoors . #39; Drinking water, etc. Product Parameters Conductivity Test Range: 0-10,000uS/cm 10.01-19.99ms 20.1-400mS/CM Resolution: 1uS/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 percentage point Precision: 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: 0.01-14.00pH Resolution: 0.01 pH Accuracy: 0.05 pH Temperature Compensation: Automatic Temperature Compensation (ATC) Working Environment: 0 to 60.0C (32.0 to 140F) TDS Factor: 0.4 to 1.0 Temperature range: 0.1-60.0 32.0-140F Temperature Accuracy: 0.5 Temperature resolution: 0.1C/F Auto shut-off: 5 mins 3x1.5LR44 Screen size: 33 x 24 mm Dimensions and weight: 183 x 37 x 37 mm (7.2 x 1.5 x 1.5 in) / 90 g (3.2 oz) Display: backlight not supported Power consumption : 2.9mA, power consumption is 0 when off The accuracy within 150ppt is relatively accurate, and the deviation above 160ppt is relatively large. Note: Be sure to clean the pads after each use Packing List: 1 water quality test pen. become very rich