What is the quality of environmental protection dust monitoring equipment in Mei Xin?

Their equipment has a high cost performance and is imitated by many manufacturers, especially the dynamic heating and dehumidification function, which is all about the sampling head and the heating there. I also come from a technical background and know a little. It's basically useless The pumping of the pump dust sensor cannot be carried out in a closed environment. The sampling head is completely unsealed, and the dynamic control performance is not good. With such a thick pipe, the air flow can't be controlled and the heating is not uniform at all. The data gap is too big. There is also the next one, which has been heated directly, and the pipe is hot, not a boiler. Winter is better than summer.