Easy to use and precision: removed test methods that were used to pass complex chemical experiments. Our pH tester is a digital water quality test, which will take the 0.01 accuracy result of pH in no time. As long as you want to test your liquid, you will easily get the results you want Auto Calibration: Our ph meter has been calibrated before factory, but recalibration is needed due to long inactivity; Easy 1-3 step calibration, the pH meter with auto calibration button can automatically identify the standard buffer solution of pH 4.00, pH 6.86 and pH 9.18 Pen type and LCD display: best test of pocket pen with stylish and lightweight look, which is convenient to carry and do your measurements anywhere. Clear LCD digital display is not only convenient to read test results but also a good choice to protect your eyes Automatic Temperature Compensation: Our pH meter has built-in Automatic Temperature Compensation (ATC ) by the temperature sensing alloy probe, so it can accurately determine the pH value of sample at any temperature within the range of 0C to 60C Usage: Portable pH, can be widely used in industry, agriculture, medicine, food, environmental protection, etc. For swimming pool, aquarium, pure water and other water quality testing Size: 155 mm *31 mm Color yellow Quantity: 1 piece