Online Continuous Emission Monitoring System

What is Online Continuous Emission Monitoring System

The online continuous emission monitoring system is a real-time monitoring system that can continuously and automatically sample and measure the air quality, then transmit and process the monitoring data for air protection.

The History of Online Continuous Emission Monitoring System

Since the 1950s, some countries in the world began to establish regional and national emission monitoring system for regular manual sampling and 24-hour cumulative sampling. With the development of industry, the air pollution is becoming more and more serious. The established sampling network cannot reflect the relationship between the short-term change of pollution and the acute incidence rate of population from the monitoring items, time and spatial resolution. Therefore, the United States began to establish online continuous emission monitoring system in six major cities in 1962 to continuously monitor carbon monoxide, nitrogen oxides, sulfur dioxide, total oxidants and total hydrocarbons. From the late 1960s to the early 1970s, Japan, the Netherlands, the Federal Republic of Germany and the United Kingdom have successively established the online CEMs monitoring system.

The long-term continuous real-time data provided by the online continuous emission monitoring system can be used to judge the pollution status and trend of the area, evaluate the effectiveness of pollution control measures, study the harm of pollution to people's health and environment, provide the basis for the establishment of air quality standards, verify the pollution diffusion model, make pollution prediction, and help design the warning control system of pollution sources.