5 in 1 Water Quality Tester The pH meter is designed with 4 in 1 function, which can measure PH, TDS, EC, salinity and temperature simultaneously with high accuracy. Omnidirectional water quality measurement to ensure the health of water quality. Precise measurement: In order to achieve high accuracy, it is equipped with high quality titanium alloy probe and reliable automatic temperature compensation (ATC), which can ensure accurate reading at different temperatures. Auto power off function Auto power off function cuts off the power after 5 minutes without any operation to save energy. IP67 waterproof rating IP67 is a certification international waterproof and dustproof rating. 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. 23.685cm