Description [5-in-1 water quality meter] TDS, PH, salinity meter, EC meter and temperature measurement are integrated. TDS measurement range: 0-1000ppm, EC measurement range: 0-10000US / cm, PH measurement range: 0.01-14.00pH, salinometer measurement range: 0.00-25.00%, temperature conversion function. [Two salinity meters] This product can detect the salinity of edible salt. At the same time, it can detect the salinity of seawater. Food salinity measuring range: 0.00-25.00%, seawater salinity measuring range: 10.1-200.0ppt. [Multipurpose test]: Portable TDS meters can be carried anywhere to measure water quality such as tap water, RO system water, aquarium, seawater, pool water. [Automatic power-off function large screen display] The automatic power-off function turns off the power after 5 minutes without any operation to save power. Employs a fully transparent liquid crystal (LCD) to display 4-digit values and the corresponding physical quantity units. [Waterproof rating IP67] IP67 is an international waterproof and dustproof certification. Protection against dust intrusion, short-time immersion. Product name: 5 in1 TDS EC meter PH meter Color: Blue TDS measurement range: 0 to 1000ppm EC measurement range: 0 to 10000S / cm PH measurement range: 0.01-14.00pH Salinometer measurement range: 0.00-25.00% Seawater salinity meter measuring range: 10.1-200.0ppt Usable temperature: 0-80 C (cannot be used for boiling water) Fahrenheit: 32-176 Battery used: CR2032 button battery x 1 Size: 152mm (H) 29mm (W) 14mm (D) Weight: about 55g [Water quality measurement / PH measurement / TDS measurement / sugar content measurement] Remove protective cover and switch on If you want to use EC / PH / TDS / sugar meter mode, press Switch and MODE / CAL button to switch modes Soak the titanium probe in water Gently stir the water quality meter to eliminate bubbles attached to the probe Press the HOLD button in about 10 seconds to lock the stable value, lift the measuring instrument, and read the measured value Press the switch-off button and wipe the probe. [3-point automatic calibration] 3-point automatic calibration with automatic temperature compensation. Immerse the electrode in PH (9.18, 6.86, 4.00) standard solution and press the CAL button to calibrate automatically. It is more convenient and saves time than conventional manual PH meters.