Online COD Sensor

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Yantai Chemins Instrument Co., Ltd.

Shandong, China

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Many organic compounds dissolved in water are absorbent to ultraviolet light. Therefore, the amount of dissolved organic pollutants in the water can be accurately measured by measuring the extent to which these organics absorb UV light at 254nm. The COD-302 online COD sensor adopts two light sources, one is ultraviolet light for measuring COD content in water and the other is reference light for measuring turbidity in water. In addition, the optical path attenuation is compensated by a specific algorithm and the interference of particulate suspended matter can be eliminated to a certain extent, so as to achieve more stable and reliable measurement.

                                                            Model
                                                            COD-302
                                                        
                                                            Sensor housing material
                                                            316L stainless steel
                                                        
                                                            Measuring principle
                                                            Dual wavelength ultraviolet absorption method
                                                        
                                                            Scale range
                                                            COD
                                                        
                                                            Turbidity
                                                            0～200mg/L equiv. KHP  0～100NTU  0～500mg/L equiv. KHP  0～200NTU
                                                        
                                                            COD Precision
                                                            ±5%F.S.
                                                        
                                                            COD Resolution
                                                            0.1mg/L
                                                        
                                                            Turbidity accuracy
                                                            ±5%F.S.
                                                        
                                                            Turbidity resolution
                                                            0.1NTU
                                                        
                                                            Calibration method
                                                            Two-point calibration
                                                        
                                                            Output method
                                                            RS-485 ( Modbus/RTU )
                                                        
                                                            Power supply
                                                            12～24VDC
                                                        
                                                            Power consumption
                                                            0.3W@12V
                                                        
                                                            Working conditions
                                                            0～45℃、<0.1MPa
                                                        
                                                            Storage temperature
                                                            -5～65℃
                                                        
                                                            Protection level
                                                            IP68
                                                        
                                                            Installation method
                                                            Immersion installation
                                                        
                                                            Cable length
                                                            5 meters, other lengths can be customized