At present, our country environmental monitoring has entered a new period of development, gradually realized from the extensive to the precise, from the status quo of monitoring to predict warning of transformation. There is no doubt that this transition includes the construction of key pollution sources monitoring device automatically. Although the pollution sources monitoring system after more than 10 years of construction, technology is more and more advanced, function more and more complicated, but to make the automatic monitor system more perfect, meet the requirements of environmental early warning and monitoring in the new period, there are still many problems need to solve urgently:

One is the design of the pollution sources monitoring device automatically and is yet to be further develop and improve product standard. Subei, jiangsu province, for example, a chemical industrial park, COD online monitoring device installed on average a month have enterprise report equipment malfunctions.