【Three-in-one pH meter】The pH meter has three-in-one function, which can measure PH, TDS and temperature with high precision at the same time. All-round measurement of water quality to ensure healthy water quality. 【Automatic Calibration pH Tester】With high sensitivity glass probe, you can get the full measurement range of 0-14pH with 0.01 pH resolution. The pH meter, on the other hand, uses a 3-point calibration method to calibrate the electrode to solutions of pH 4.00, pH 6.86 and pH 9.18. You can easily calibrate to ensure the accuracy of your measurements. 【High-precision water quality tester】The high-precision algorithm chip and electrodes of our digital water quality pH tester ensure accurate and fast response. The green backlit LCD design ensures that you can read measurements under any conditions. The one-button lock reading feature helps lock readings even when the pH meter is removed from the sample 【Automatic Temperature Compensation Digital pH Meter】No longer need to pay attention to the temperature of the test liquid, the pH meter can accurately measure the pH value of the sample in the temperature range of 32°F-140°F (0°C-60°C), thus solving the problem of Inaccuracies caused by changing liquid temperature. 【Pocket Water pH Tester】You can use this pocket-sized but powerful pH meter device to measure your aquarium, swimming pool, pond in garden, bathtub to test pH level. Digital ph meters can also be used to measure drinking water, RO systems, spas, soap mixes, food, wine, beer or any other liquid.