[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 accuracy. 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.