The utility model discloses a dual-wavelength seawater COD on-line measuring device, comprising a housing and a set in the control and signal processing unit, the light source and the signal acquisition unit, characterized in that the housing is arranged below the open the import and export of the collecting tank, said collecting tank is arranged above the inclined plane, the two sides of the gathering pond quartz optical window is set cleaning brush, the cleaning brush is driven by the motor. The utility model measurement by measuring the strength of the transmitted light signal is inverted by the COD and turbidity, can realize the direct measurement of sea water COD, fast detection speed, thereby avoiding the tedious step of, at the same time the need of chemical reagent, sea water to avoid secondary pollution of the water. The double-light source structure, can be effectively deduct the turbidity to the impact of the COD measurement, the measurement accuracy of the device is improved. Improves the environmental protection sector COD of the monitoring level of the sea water, for effectively preventing water pollution COD provide effective technical support.
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