🌊【6 IN 1 DIGITAL WATER TESTER】Water quality tester utilizes the latest technology to accurately measure the six core indicators (COD, TOC, UV275, TDS, EC, Temperature) to provide a comprehensive water quality assessment, the TDS water tester has built-in temperature compensation to ensure accurate data 🌊【PORTABLE DESIGN】Water tester for drinking water has a pen-like design, measuring 5.9 inches x 1.57 inches, easy to carry, Digital water tester is widely used for drinking water, swimming pools, laboratories, hydroponics, aquariums, well water, tap water and wastewater testing 🌊【EASY CALIBRATION】Digital water tester one click calibration, no tedious calibration procedure, just put the TDS tester into pure water and select the calibration button and wait for three seconds. Tips: Please use pure water for calibration, not mineral water or natural drinking water 🌊【SMART QUALITY ASSESSMENT】Water quality meter adopts color backlit LCD screen, supports multi-angle night reading, through the LCD backlight color display water quality status: excellent, good, medium, poor four grades, water quality status at a glance 🌊【LABORATORY-GRADE WATER TESTER】Our instrument realizes rapid on-site testing of TDS, COD, TOC, UV275, conductivity and temperature. TDS meter digital water tester is no longer limited by the laboratory environment, and is widely used in home, outdoor adventure, travel and emergency scenarios of water quality safety water tester This TDS meter digital water tester is specifically designed for various applications, including tap water, purified water, and groundwater.  Digital pool water tester utilizes ultraviolet absorption spectrophotometry to measure key parameters such as COD, TOC, and UV275 in drinking water.  Additionally, digital water tester determines the water's TDS and electrical conductivity by measuring the conductance between electrodes. To provide a comprehensive assessment of water quality, the instrument features an intelligent scoring function.  Pool water testing kit is displayed through the LCD backlight color, which indicates four levels of water quality: fine, good, average, and poor.  Moreover, water quality meter incorporates a temperature correction feature that ensures accurate and consistent readings. Features: Simultaneous 6 parameters measurement (COD, TOC, UV275, TDS, EC, and Temperature) Color screen display Colored backlight serves as an indicator of different water quality levels and score With ambient temperature compensation Easy to carry small, portable, and pen-like design Easy calibration procedure