Fast response digital online COD probe sensor water

For most organic substances, when the wavelength is in the range of 215~316nm, they all present different absorption curve characteristics. Therefore, the COD monitoring technology of ultraviolet absorption method is to use the absorption characteristics of ultraviolet light at 254 nm wavelength to set up the absorbance standard curve, and to derive and calculate the COD value according to the absorption law in Lambert-Beer's law. At the same time, in order to eliminate the influence of water turbidity on ultraviolet light absorption, the interference of water turbidity is usually eliminated by measuring the visible light absorbance at 546nm wavelength, and the more accurate COD value of ultraviolet absorption method is measured by dual-wavelength measurement method. This COD351 UV absorption online COD Sensor has the advantages of simple maintenance, no secondary pollution, low failure rate, low monitoring cost, and continuous online monitoring, etc., and adapts to the development requirements of modern environmental monitoring instruments. Therefore, it is of great significance to vigorously develop and apply the UV absorption COD online monitor to improve the control effect of sewage water quality. When used with a COD Controller, more functions such as data display, control and output can be realized.