Electronic Water Analysis Tester: pH, litmus test strip, and temperature are perfectly combined in one meter. The pH tester is suitable for your needs in measuring the pH of your water, saving you time and money to ensure your water quality. Innovative Litmus Test Strip Function: Designed with the Litmus test strip function, the color of the LCD screen will change with the change of pH, just like the Litmus test paper. With double verification, you can determine the pH value faster and more accurately. With the high-resolution LCD backlight and dual data display, all details are designed for high accuracy and long-term use. High Accuracy and Fast Measurement: The high-precision algorithm chip and electrode of our digital water pH tester ensure accurate and fast response. With automatic temperature compensation, the pH meter can accurately determine the pH of the sample within the temperature range of 0°C to 80°C to solve the inaccurate problem caused by the liquid temperature. Effortless Long-Lasting Accuracy: The water quality pen has been calibrated by the manufacturer. The digital pH meter uses a single-point (0.1 accuracy) or three-point (0.01 accuracy) calibration method (pH 4.00, 6.86, and 9.18), you can calibrate the pH meter to the accuracy you need, effortlessly to ensure the accuracy of your measurements. Widely Use pH Meter: The pH meter with litmus test strip function is an indispensable tool to improve your quality of life. This digital pH tester can be used for drinking water quality analysis, swimming pool quality monitoring, measuring pH balance in RO/DI systems, aquariums, spas, hot tubs or hydroponics, etc.