This multifunctional meter is an essential tool to improve your life quality. This digital ph tester can be applied in the following applications; main applications: drinking water quality test, swimming pools quality monitor; other applications: PH balance measurement in /DI system, aquarium, spa, hot tub, fish tank, garden water or hydroponics. More precise accuracy design and larger testing range than others to your drinking water is . TDS meter is designed with 5-in-1 function, which can be measured PH, TDS, EC, SALITY, and TEMPERATURE of water. Fulfill all your testing requirements - fully test water quality it is ready to use right out of . Just dip the probe of the PH tester into the liquid to start the test Easy to carry & use. Everyone could use this pocket size small but professional tds tester device to measure your drinking water, pool, fish tank, garden water and etc. And pH meter features a green Backlight LCD to help you see the measurement clearly in any situation. Cover without It is a multi-functional water quality pen product, which can measure ph pH, tds solubility, ec conductivity, salinity and temperature. It is a waterproof water quality test pen with five functions. It has high performance, pen shape design, fast numerical stability and Accurate calculation results. Parameters: TDS Measuring range: 0-1000ppm EC measurement range: 0-10000US/cm PH measurement range: 0.01-14.00pH Salinity measurement range: 0.00-25.00% Seawater salinity measurement range: 10.1-200.0ppt. Accuracy: 0.01-5.00% (0.1%) 5.01-25.00% (1%) Display size: 33 x 24mm Display: support backlight Waterproof grade: IP67 Color: As Shown Material: plastic Package Contents: 1 x Water Quality Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.