Auto Calibration-This Digital Ph Meter Calibrated At Factory, This Digital Ph Tester Get The Result Fast And Accurate, The Ph Tester Digital Has An Auto Temprature Ompensation Feature That Adjusts To Water Temperatures And Water Quality To Give Ph Readings Almost Instantly High Accuracy-Water Ph Meter Has A Sensitive Electrode Sensor To Read Accurate Ph Levels. The Included Detailed Manual Will Show You How To Get The Best Accurate And Stable Reading, Ensure Your Pool, General Hydroponics Ph Or Even Drinking Water Has A Perfect Ph Balance. Automatic Temperature Compensation-Auto Digital Ph Meter Kit Has An Auto Temperature Compensation Feature That Adjusts To Water Temperatures And Water Quality To Give Ph Readings Almost Instantly. Wide Use-Ph Reader For Water With High Quality Glass Ph Probe, Appropriate For Wide Range Of Applications, Suitable For Testing Ph Balance Of Drinking Water, Pool, Aquarium, Ro System, Spa, Hydroponics, Food, Wine And Beer Making And More. This Ph Meter Is The Ideal Test Kit For Home And Laboratory Uses. Fast After-Sales Response-If There Are Any Quality Problems Of Our Products, Please Do Not Hesitate To Contact Us, We Will Solve It For You Within 24 Hours