Easy to useRemove the protective cap and turn on the pH meter by pressing the "ON/OFF" key, immerse the electrode in the test solution to be tested, stir gently and wait for the reading to stabilizes. When finished, clean the electrode with distilled water, turn off the pH meter and replace the protective cap. High Accuracy PH MeterThe PH meter uses an electrode PH sensor sensitive glass bulb that can quickly and clearly read accurate PH values in the measuring range 0-14.0. This accurate pH test kit (0.01 resolution) is so accurate that it can accurately test pH 0.02 Auto CalibrationThe pH meter has a calibration function automatic that you can adjust according to temperature and water quality. and the PH reading can be obtained by waiting a few seconds during the test. Additionally, you can calibrate the tester with the one-touch "CAL" button using the calibration buffer powder. Automatic Temperature CompensationThe product provides comprehensive pH 0 -14 measurements with temperature compensation which will make the result more accurate. The temperature of the test liquid can range from 0C to 60C (32F to 140F). Wildlife ApplicationEasily slips into your pocket or bag and does not won't get you anywhere. The PH meter is an ideal choice for families and laboratory testing of PH value, which is suitable for PH balance test of drinking water, swimming pool, aquarium, RO system, spa or hydroponics; Suitable for a wide range of applications.