[5-in-1 Water Quality Test] The pH meter is designed with a 4-in-1 function, which can simultaneously measure PH, TDS, EC, salinity, and temperature with high accuracy. Omnidirectional water quality measurement to ensure the health of water quality. [Accurate Measurement]: In order to achieve high accuracy, it is equipped with a high-quality titanium alloy probe and reliable automatic temperature compensation (ATC), which can ensure accurate readings at different temperatures. [Auto Power Off Function] The auto power off function cuts off the power after 5 minutes without any operation to save energy. [IP67 Waterproof Rating] IP67 is an international waterproof and dustproof certification. Dustproof, short-term immersion protection. [Wide Range of Uses]: This water quality detector is ideal for testing water, swimming pools, aquariums, spas, hydroponics, laboratory and drinking water, etc.