Equipped with big backlit LCD screen, this water quality tester is easy and convenient to read data in real time. This product is a portable TDS, EC, salinity, S.G and temperature water tester, which can quickly and steadily respond to the reading, and has a calibion function to ensure high accuracy. It is made of high quality ABS material. The length of this product is 15.9cm, width is 3.4cm and thickness is 1.6cm. Water tester is perfectly suitable for swimming pool, hotel, aquariums, etc. Item Name: Water Tester Material: ABS Specifications: EC: Range: 0 to 10000uS / cm 10.01-19.99mS 20.1-400mS/CM Resolution: 1uS / cm; 0.1 ms / cm; Accuracy: 2 F.S TDS: Range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt (auto out of range) Resolution: 1ppm; 0.1 point Accuracy: 2 F.S Salinity: Range: 0.00 to 25.00% Resolution: 0.01% Accuracy: 0.01-5.00% ( 0.1%) 5.10-25.00% ( 1%) SG: specific gravity of seawater 1.000-1.222 Calibion: EC: Three-point calibion is optional (1413uS 12.88mS 111.8mS) Temperature Compensation: ATC Opening Environment: 0 to 80.0 Celsius (32.0-176F);