Simply put, the VOCs online monitoring system mainly monitors gas, while the CEMS flue gas online monitoring system mainly targets the flue gas emitted after combustion.

The working principle of VOCs online monitoring is: through continuous sampling of gas, specific components are analyzed, the required components pass through the detector, and the detector outputs an electrical signal proportional to the concentration, which is the final monitoring data. And through the component-based detector type selection, the required monitoring range can be intelligently adjusted. Upload the data to the platform of the Environmental Protection Agency for real-time monitoring of whether it exceeds the standard.

(Continuous Emission Monitoring System) referred to as CEMS. With the development of environmental protection, the technology of CEMS has become more mature and standardized. At present, most of the domestic flue gas CEMS adopts “large system integration”, that is, the main analysis components adopt imported equipment, which guarantees the accuracy of the measurement. The system collects SO2, NOx, O2, sampling head temperature, condenser temperature, heating wire Temperature, filter humidity, and flue gas flow rate during sampling are used to determine whether the data is valid. Each piece of data is marked with valid or invalid.