Four-in-one function: With four-in-one function, it can measure PH, EC, TDS and temperature simultaneously, with high measurement accuracy. Comprehensive water quality measurement to ensure water quality. in good health. Pocket size: Pocket size, lightweight and portable, equipped with a large backlit LCD screen, easy to read, does not affect use in the dark. Automatic temperature compensation: the automatic temperature compensation the temperature will affect the reading level, our instrument's automatic temperature compensation can guarantee you the best reading. Waterproof and replaceable sensor probe: IP65 waterproof and replaceable sensor probe - The electrode probe Adopts replaceable design, which is convenient and quick to replace. Wide range of applications: The water quality detector is suitable for measuring drinking water, hydroponics, aquariums, swimming pools, laboratories, etc.