5-in-1 Water Quality Tester: Digital pH Tester with monitoring TDS, pH, salinity, EC meter and temperature measurement. TDS measurement range: 0-200000ppm, EC measurement range: 0-200000US/cm, PH measurement range: 0.01-14.00pH, salt water meter measurement range: 0.00-25.00%, temperature conversion function. High Precision: The high precision algorithm chip and electrodes of our digital water pH tester ensure accurate and fast response. When the measurement is stable, simply press the HOLD/TEMP key to lock the measurement and take it out for viewing, which is very simple. Two salinity meters: A digital pH meter can detect the salinity of table salt. At the same time, it can detect the salinity of seawater. Food salinity measurement range: 0.00-25.00%, seawater salinity measurement range: 10.1-200.0pptAuto power off function and large screen display: The pH tester has a backlit LCD to help you see the measurement results clearly in any situation. The auto power off function turns off the power after 5 minutes, saving power without any operation. A fully transparent liquid crystal (LCD) is used to display the 4-digit value and the corresponding physical unit of quantity. Automatic Temperature Compensation: Temperature may affect reading levels, digital hydroponic PH meter has a range of 0C-60C (-0-140F), automatic temperature compensation ensures you get the best readings, so you can rest assured Test in any environment. Waterproof grade: TP67 (it can still be used after falling into the fish tank)Interchangeable ProbeAuto Calibration