[Features] ◆ Measurement Principle: UV absorption method, measuring the absorption of organic substances at 254nm wavelength of UV light. ◆ UV254 LED light source with long lifespan and minimal drift; designed with optical filters for low interference and stability. ◆ Capable of simultaneously measuring parameters such as COD, TOC, turbidity, and temperature. ◆ COD values can be measured without any chemical reagents, causing no pollution to the environment. ◆ Internal sensor with automatic turbidity compensation, immune to environmental interferences. ◆ Compact size, automatic internal cleaning to prevent biofouling, adjustable cleaning frequency with one automatic cleaning at startup. ◆ Equipped with RS-485 digital output, compliant with Modbus RTU protocol. ◆ Low power consumption and internal circuitry designed for anti-interference. ◆ Measurement principle compliant with NIEA W518.51C method announced by the Environmental Protection Administration. When organic substances are dissolved in water, UV light exhibits absorption. The degree of absorption of organic substances at 254nm UV light is measured to determine the chemical oxygen demand (COD). Additionally, SS detection is conducted through a 530nm beam, with automatic compensation for turbidity and color. [Application Areas] Suitable for monitoring in freshwater and marine aquaculture, wastewater treatment plants, surface water monitoring, tap water plant monitoring, lake and reservoir monitoring, and marine water resources, among others.