Large Backlit LCD Display for Easy Reading: The water quality counter features a large backlit LCD screen, providing superior visibility and wider viewing angles for easy data reading, including in low-light conditions. Wide Range of Uses: This pocket pH meter is an ideal pH tester for use with water, swimming pools, aquariums, hot springs, hydroponics, food, wine, and beer making. Fast and Accurate Measurements: Ensure perfect pH balance in drinking water, swimming pools, and hydroponic systems with this accurate pH tester. The pH water meter includes a sensitive electrode sensor that delivers precise pH readings. Automatic Temperature Compensation: The pH tester has a built-in automatic temperature compensation (ATC) function, eliminating concerns about liquid temperature and ensuring accurate pH measurement of the sample. Easy Calibration: The pH pen features automatic temperature compensation and can be calibrated to adjust for temperature and water quality, providing immediate pH readings. The tester is compatible with buffer powder for calibration and testing.