4 in 1 digital PH meter ester: The PH meter is designed with 4 in 1 function which can measure PH/TDS/EC/TEMPERATURE simultaneously with high accuracy and quickly. Omnidirectional measurement to ensure the sanitary quality of water. Electronic pH meters have reliable quality, IP 67 waterproof durable ABS material, ergonomic pocket size, best price, all this makes it your FIRST water quality tester. 0.01 pH Measurement Accuracy: With high sensitivity glass probe, the full measuring range of swimming pool water test is 0-14 pH, with a resolution of 0.01 pH . And the pool pH tester uses a 3-point calibration method, calibrating the electrode to pH 4.00, pH 6.86 and pH 9.18 solutions to ensure your measurements are accurate. Easy to calibrate: Simply immerse the electrode in the target solution, then press and hold the MODEL/CAL button for 5 seconds after the readings to stabilize (usually 5s-10s) and the calibration will be done automatically. A large backlit LCD screen and dual temperature and pressure displays can help you get accurate and fast readings. If there is no operation within 5 minutes, the ph test will automatically stop Automatic temperature compensation (ATC): no need to pay attention to the temperature of the liquid to be tested, the pH meter can accurately determine the pH value of the sample within the temperature range of 0C at 60C (32F to 140F), in order to solve the problem of inaccuracy caused by variation in liquid temperature. Wide Application: We have all the electronic ph meter occasions you need! Featuring a pocket size, the pH tester is ideal for everyday use at home, in education and for testing. pH tester suitable for testing the pH of drinking water, swimming pool, aquarium, spa, hydroponics, food, wine and beer, etc.