PH Meter 4 in 1 Digital Tester: PH meter is designed with 4 in 1 function which can measure PH\/TDS\/EC\/TEMPERATURE simultaneously with high precision and quickly. Omnidirectional measurement to ensure the health of water quality. The electronic ph meters have reliable quality, IP 67 waterproof durable ABS material, ergonomic pocket size, best price, all these make it your FIRST water quality tester. 0 .01 pH Measurement Accuracy: With a high sensitivity glass probe, the full measurement range of the swimming pool water test is 0-14pH, 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: Just dip the electrode into the target solution, then press and hold the MODEL\/CAL button for 5 seconds after readings to stabilize (usually 5s-10s) and the calibration will be done automatically. A large LCD backlit display 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 shut down 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 in the temperature range of 0C-60C (32F-140F), so as to solve the problem of inaccuracy caused by the variation in liquid temperature. Extensive Application: We've got all the electronic ph meter occasions you need covered Featuring a pocket size, the pH tester is ideal for everyday use at home, in education and for testing.PH tester is suitable for testing the pH of drinking water, swimming pool, water aquarium, spa, hydroponics, food, wine and beer etc..The ZMD team is at your service and we hope you enjoy your life