Water Quality Tester 6 in 1 COD Temp TOC Conductivity TDS UV275 Water Meter Monitor for Aquarium 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.