5 in 1 Water Quality Test The pH meter is designed with 4 in 1 function, which can measure PH, TDS, EC, salinity and temperature simultaneously with great precision. Omnidirectional water quality measurement to ensure the health of water quality.Precise measurement: In order to achieve high accuracy, it is equipped with an alloy probe of high quality titanium and reliable Automatic Temperature Compensation (ATC), which helps ensure accurate reading at different temperatures.Auto power off function The power off function auto voltage cuts off the power after 5 minutes without any operation to save energy.IP67 Waterproof Rating IP67 is an international waterproof and dustproof certification. Protection against dust intrusion, short-term immersion.Wide range of uses: This water quality detector is ideal for testing water, swimming pools, aquariums, spas, hydroponics, laboratory and drinking water etc.