UV254 - Based Dissolved Oxygen Sensor: Precise, Multi - Parameter, and Eco - Friendly

Taking the Dissolved oxygen sensor that measures with the dual-light-source method based on the UV254 absorption method as an example, its measurement principle is based on the ultraviolet absorption method. During operation, the light source inside the instrument emits ultraviolet light, and the light of two wavelengths, 254nm and 350nm, is separated by a filter. The water sample is illuminated by ultraviolet light in the flow cell. Part of the light is absorbed as it passes through the flow cell. According to the Beer-Lambert law, the light absorption is determined by detecting the absorption of unsaturated organic molecules at the wavelength of 254nm. The light intensity of the 350nm wavelength is used to correct the influence of turbidity on the measurement results, and finally, the measurement results are obtained through calculation.

It can simultaneously and real-timely measure multiple parameters such as COD, TOC (Total Organic Carbon), turbidity, and temperature, providing comprehensive data support for the water quality situation. Moreover, it has an internally integrated turbidity detection light source, which can automatically compensate for the interference of the turbidity of the water body to be measured, ensuring the accuracy of the measurement results.

It uses imported LED dual light sources, which can automatically eliminate the interference of turbidity and suspended substances, and the data has strong stability. As a digital sensor, it has excellent anti-interference ability. Without the need for traditional secondary instruments, it can be directly integrated with devices such as PLC, DTU, DCS, and touch screens, making it convenient to be applied in various water quality monitoring systems.

Compared with traditional chemical methods, it does not require reagents, does not require pretreatment, and does not produce secondary pollution. It is both environmentally friendly and can reduce the usage cost, and it is widely applied in fields such as municipal tap water, drinking water, pipeline network monitoring, and farmland irrigation.