Parameters of Professional COD Analyzer Measurement range of the Professional COD Analyzer: COD: 5 ~ 2000mg / L, exceeding the dilution determined. Indication error: COD: Indication error ≤ ± 5% Repeatability: ≤ 3% Resistance to chloride interference: ≤ 2000mg / L Temperature control system: room temperature ~ 180 ℃ can be set, COD digestion temperature of 165 ℃. Temperature control accuracy: ± 1 ℃ Temperature control time: 1 ~ 999min adjustable Digestion time: 10min. Optical stability: Instrument absorbance values drift less than 0.002A within 20min Batch capacity: four water samples (or optional 16 water samples) Dimensions: COD analyzer 80mm × 230mm × 55mm Digestion device 105mm × 160mm × 90mm Weight: 0.5kg digestion device, Host: 1kg Host power consumption: current <40μA; digestion power consumption: <65W Normal conditions of use: Ambient temperature: 5 ~ 40 Relative humidity: ≤ 85% Power supply: Host: 4 piece 5 # batteries Digestion device: Car power adapter or 220V power supply(battery or optional power supply) no significant vibration and electromagnetic interference, avoid direct sunlight.