3-in-1 pH MeterpH meter has a 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 TesterWith high sensitive glass probe, you can get a full measurement range of 0-14pH, 0.01 pH resolution. And pH meter 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 calibrate effortlessly to ensure the accuracy of your measurements. High Accuracy Water TesterHigh-accuracy algorithm chip and electrode of our digital water ph tester ensure accurate and fast response. Green Backlit LCD Design guarantees that you can read the measuring results in any condition. One-button lock reading function helps lock reading even if the tds Meter is taken out of the sample! Pocket Size Water pH Tester You can use this small Pocket Size but powerful pH meter device to measure your aquarium, pool, pond in a garden, bath tub to test the levels of pH value. The digital ph meter can also be used to measure drinking water, RO System, spa, soap mixtures, food, wine, beer or any other liquids.