Features 6 in 1 Water Tester: Wide in testing range, the water quality tester is able to test the COD, temperature, TOC, conductivity, TDS and UV275. LCD Digital Display: Colorful 1.14in TFT screen will clearly show the test valve, and the digital display will largely simplify your operation. With Premium Design: The probe is IP67 waterproof, while the environmental temperature compensation function will largely improve the accuracy. Broader Application: Suits for hydroponics, horticulture, swimming pool and spa, aquarium and coral tank, ionized water generator and more. Convenient Carrying: Designed to have a light weight and a compact size as well, the water quality tester is very convenient to carry and use. Specification: Item Type: Water Quality Tester Test Target: For tap water, purified water, bottled water, groundwater, surface water, and other non sewage domestic drinking water.  Detection Parameters: COD, TOC, UV275, TDS, conductivity, temperature.  Measurement Range: 0-100mg/L for COD, 0-100mg/L for TOC, 0-1.0au/cm for UV275, 0-2000ppm for TDS, 0-4000us/cm for conductivity, 0-50℃ for temperature.  Resolution: 0.01mg/L for COD, 0.01mg/L for TOC, 0.001 au/cm for UV275, 1 ppm for TDS, 1 us/cm for conductivity, 0.1℃ for temperature.  Measurement Accuracy: COD: 0-5mg/L: ± 0.5mg/L. 5-100mg/L: ± 10% H, H is the standard value.  TOC: 0-5mg/L: ± 0.5mg/L. 5-100mg/L: ± 10% H, H is the standard value.  UV275: 0-0.1au/cm: ± 0.01au/cm. 0.1-1.0au/cm: ± 10% H, H is the standard value.  TDS: ± 3% FS, FS is the full scale value.  Conductivity: ± 3% FS, FS is the full scale value.  Temperature: ± 1℃.  Display Screen: 240 x 135, 1.14in TFT color screen.  Power Supply: 2 x AAA alkaline dry battery, shipped without battery.  Measurement Temperature Range: 5-50 ℃, 0-85%RH, non condensing.  Storage Temperature Range: -10~60 ℃, 0~85%RH, non condensing.   Package List: 1 x Water Quality Tester 1 x User Manual Package List 1 x Water Quality Tester 1 x User Manual