5-IN-1 Water Quality Tester: Our water quality tester is designed in a five-in-one format. It can simultaneously measure PH, EC, TDS, SALT and TEMP with great precision.Comprehensive water quality measurement to ensure healthy water quality. Speed Test: You can know the water quality, accuracy and speed in 5 seconds. Reliable quality, wide usage, simple method, all these make this pH tester your best choice. Reliable and fast reading. Wide Range of Uses: Our digital tester is very small, with a protective cover, is not easy to be damaged, and is easy to use. It is an ideal choice for drinking water, daily household use, hydroponics, laboratory teaching and more. Automatic Calibration: Temperature can affect reading levels, our pH meters automatic temperature compensation can ensure you get the best reading possible. Product Parameters Conductivity test range: 0-10000uS/cm 10.01-19.99ms 20.1-400mS/CM Resolution: 1uS/cm; 0.1mS/CM Accuracy: 2% of reading Tds test range: 0 to 1000ppt 1000ppm to 10000ppt 10.1 to 200.0ppt Resolution: 1ppm; ; 0.1ppt 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: 0.01-14.00pH Resolution: 0.01pH Accuracy: 0.05pH Temperature compensation: automatic temperature compensation (ATC) Working Environment: 0-60.0C (32.0-140F); 100% RH TDS factor: 0.4 to 1.0 Temperature range: 0.1-60.0 32.0-140 Temperature Accuracy: 0.5 Temperature resolution: 0.1/ Automatic shutdown: 5 minutes 3x1.5LR44 Screen size: 33*24mm Size and weight: 183 * 37 * 37mm (7.2 * 1.5 * 1.5in) / 90g (3.2oz) Display: support backlight Note: Every time you use it up, you need to clean the electrode