AUTOMATIC CALIBRATION - This digital pH meter factory calibrated, this digital pH tester gets the result fast and accurate, the digital pH tester has automatic temperature compensation function which adapts to the temperature of the l water and water quality to give pH readings almost instantly HIGH ACCURACY - The water pH meter has a sensitive electrode sensor to read accurate pH levels. The detailed manual included will show you how to get the best accurate and stable reading, ensuring your pool, general hydroponic pH or even drinking water has a perfect pH balance.AUTOMATIC TEMPERATURE COMPENSATION - The kit Automatic digital pH meter features an automatic temperature compensation feature that adjusts to water temperatures and water quality to give pH readings almost instantly. WIDE USE meter -PH for water with high quality glass pH probe, suitable for a wide range of applications, suitable for testing the ph balance of drinking water, swimming pool, aquarium, Ro system, spa, hydroponics, water manufacturing food, wine and beer and more. This pH meter is the ideal test kit for home and laboratory uses.