The pH value is a measure of the acidic or basic character of an aqueous solution and refers to the concentration of hydrogen ions. The lower the pH value, the higher the acidity on a scale from 0 to 14. Pure water has a pH value of 7 and is considered neutral. Liquids with a pH value above 7 are bases or alkaline solutions. The pH value is particularly important for fish and plants in aquariums and ponds, for drinking and heating water, swimming pools, and in the production of food and cosmetics. With the digital pH meter PH CHECK, you can easily and reliably determine the pH value and the current temperature. The pH values of solutions are temperature-dependent. The integrated thermometer provides automatic temperature compensation, ensuring particularly accurate results. By pressing the HOLD button, the current measurements are retained and displayed permanently. Regular calibration ensures the functionality of the device and is easy to perform. The permanently attached glass probe is especially suitable for measuring in aggressive media. The pH meter is splash-proof according to IP65 and can be cleaned under running tap water or with distilled water after use. To prevent the electrode from drying out, it should always be stored in the supplied container filled with a special solution.