7 Functions Tester:Featuring 7 functions, the salt water tester allows for easy switching between measuring pH, EC (us/cm), TDS (ppm), Salinity (ppm/%), S.G, and ORP (mv) by simply pressing the MODE/CAL key. The upgraded titanium sensor head with high electrode sensitivity ensures precise and rapid measurement of liquid values. Automatic Temperature Compensation Function:the salt water tester minimizes errors caused by temperature fluctuations. With an IP67 waterproof rating, it is dust and leak proof, while the LCD backlit display offers clear and easy-to-read digital readings. The automatic shutdown function conserves energy by turning off the power after 5 minutes of inactivity. Easy to Use:simply immerse the electrode into the solution to be tested, wait for the data to stabilize, and press the HOLD/TEMP button to lock in the measurement value and obtain the required data. The test mode switch button provides convenience in selecting the appropriate mode. Multiple Salinity Test Modes:Offers multiple salinity test modes, including Salinity Test (0-9999 ppm), Seawater Test (10-200 ppt), and Food Test (0.01-25%). TDS and salinity share the same units, and the pH Meter must be switched to Salinity Mode when measuring salinity to ensure accurate and reliable results. Wide Application:the salt water tester can be used in saltwater pools, swimming pools, beauty spas, aquaculture, sewage treatment, educational experiments, medical environments, fish tanks, seawater monitoring, aquariums, and ocean salinity monitoring to ensure water quality.