High Accuracy: Supplied with calibration powders pH 4.00, pH 6.86, pH 9.18. the automatic calibration button, the water pH meter automatically recognize the calibration, easy and convenient. The detailed manual included show you how to get the best accurate and stable reading. Multifunctional Measuring: pH meter has a three-in-one function, which can measure PH, TDS and temperature with high precision. You just need to remove the protective cover and immerse the pH meter electrode in the solution. Backlit LCD Design: Don't worry about seeing the displayed value when there is insufficient light. Our ph tester digital is equipped with a high-quality titanium alloy probe and glass electrode that can achieve fast and convenient testing. Put the probe into the liquid to be tested, wait for 1 second and read. Waterproof and Dustproof: IPX67 high-level waterproof and dustproof can protect our testing instruments well. Liquid temperature may affect reading levels, but our digital pH water quality tester can accurately measure the pH value of the sample in the temperature range of 0°C-60°C / 32-140℉, and PH tester can automatically identify the calibration solutions to read the digital in a snap., Manufacturer: Celabie