【5 in 1 Multifunction】- This digital pH meter is designed with 5 in 1 function, which can be used to test PH/TDS/EC/salinity/temperature of water. The measurement range is pH 0.00-14.00 (accuracy 0.01PH), TDS 0-10000ppm, 10.1-200.00 ppt, EC 0-10000uS/cm, 10.1-19.99mS.20.1-400.0mS/cm, salinity 0.01%-25.00% and temperature 0-60℃.Waterproof Level: IP67 【GREEN LCD BACKLIT DISPLAY DESIGN】- This PH meter is designed with a bright green backlit LCD display that displays information in an intuitive layout. You can still read the digital even in low visibility situation. With portable pocket design, it is also convenient to carry. And the 5-minute auto-off design saves power and ensures battery life. 【HIGH PRECISION PH TESTER】- The glass probe of this PH tester is made of low resistance (25MQ) glass sensitive film, and the response speed is 0.1 seconds. TDS electrodes are made of agile and high quality titanium alloy with perfect corrosion resistance. The pH meter adopts three-point calibration method to calibrate the electrode at pH 4.01/6.86/9.18 solution to ensure the measurement accuracy. 【AUTOMATIC TEMPERATURE COMPENSATION AND CALIBRATION】- Liquid temperature can affect reading levels, but our pH digital water quality tester can accurately measure sample pH value within the temperature range of 0°C to 60°C / 32 to 140°F, and PH tester can automatically identify calibration solutions to read digital at a glance.