Usage Tips:[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.<br> [Precise measurement]: In order to achieve high accuracy, it is equipped with an alloy probe of titanium and reliable Automatic Temperature Compensation (ATC), which helps ensure accurate reading at different temperatures.<br> [Auto power off function] The power off function auto voltage cuts off the power after 5 minutes without any operation to save energy.<br> [IP67 Waterproof Rating] IP67 is an international waterproof and dustproof certification. Protection against dust intrusion, short-term immersion.<br> [Wide range of uses]: This water quality detector is ideal for testing water, swimming pools, aquariums, spas, hydroponics, laboratory and drinking water etc.