Environmental issues are among the major societal concerns in many countries, and industrial discharges contribute significantly to environmental pollution. To better monitor and control industrial wastewater discharges, many regions adopt online monitoring systems.

In accordance with national standards and relevant technical requirements for the installation and construction of pollution source automatic monitoring facilities, water quality online monitoring instruments are installed at specified discharge points. These instruments monitor various water quality parameters, such as chemical oxygen demand (COD), ammonia nitrogen, total phosphorus, total nitrogen, heavy metals, flow rate, pH, etc. This approach aims to achieve real-time monitoring and management of pollutant sources by relevant management and regulatory authorities.

The water pollution source online monitoring system is primarily composed of the analysis unit, sampling unit, and data transmission unit. Establishing an integrated automatic monitoring system for water pollution sources serves two main purposes: providing real-time monitoring data to environmental protection regulatory authorities and enabling enterprises to promptly understand their own discharge conditions, wastewater treatment efficiency, and treatment process effectiveness. This, in turn, offers effective guidance for the normal and efficient operation of wastewater treatment processes.