5-in-1 Water Test: The pH meter is designed with 5-in-1 function to measure PH, TDS, EC, salinity and temperature simultaneously with high accuracy. Comprehensive measurement water quality to ensure healthy water quality.Accurate measurement: For high accuracy, it is equipped with a high-quality titanium alloy probe and reliable automatic temperature compensation (ATC), which guarantees accurate readings at different temperatures. When the value measured is stable, long press the HOLD/TEMP button to lock the measured value, and pull it to view, very simple.Auto-off function and large screen] The PH tester has a backlit LCD screen, allowing you to see the measurement results clearly in any situation. Auto-off feature turns device off after 5 minutes idle to save power. A fully transparent liquid crystal (LCD) is used to display the 4-digit values and their corresponding physical units of measurement.IP67 Waterproof Rating: IP67 is an international waterproof and dustproof certification. Prevent dust intrusion, short-term soaking.Versatile use: This water quality tester is ideal for testing water, swimming pools, aquariums, spas, hydroponics, laboratories and drinking water, etc.