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: IP67GREEN 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- The temperature of the liquid can affect the reading levels, but our pH digital water quality tester can accurately measure the pH value of the sample within the temperature range of 0 C to 60C / 32 to 140F, and PH tester can automatically identify calibration solutions to read digital at a glance.WIDE APPLICATION - This 5 in 1 multifunctional pH tester is ideal for both home and laboratory pH testing applications, which can be used to test the quality of drinking water, swimming pools, aquariums, hot springs, from aquaculture, ponds, and indoor water well or while on vacation to ensure water safety in daily life. This product does not include batteries, which need to be purchased separately Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, it there will be a certain color difference, the actual object received shall prevail.