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. 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. 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. 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. Description: Cover without More precise accuracy design and larger testing range than others to your drinking water is healthy. 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!