[5-in-1 Water Quality Test] The pH meter is equipped with a 4-in-1 function, which can measure PH, TDS, EC, salinity and temperature at the same time with great precision. Omnidirectional water quality measurement to ensure the health of water quality. [Precise Measurement]: In order to achieve high precision, it is equipped with an alloy probe made of high-quality titanium material and reliable automatic temperature compensation (ATC), which helps to ensure accurate readings at different temperatures. [Automatic shutdown function] The automatic shutdown function turns off the power after 5 minutes of no operation to save power. [Waterproof grade IP67] IP67 is an international waterproof and dustproof certification. Protection against dust ingress, short-term immersion. [Wide range of applications]: This water quality detector is ideal for testing water, swimming pools, aquariums, spas, hydroponics, laboratory and drinking water, etc.