Heavy pollution control PID (Proportion Integration Differentiation) monitoring equipment and application method

The invention discloses heavy pollution control PID monitoring equipment in the technical field of PID monitoring equipment, and the equipment comprises a basic assembly which comprises a PID monitoring equipment main body; and the self-conversion type cleaning assembly comprises a circular mounting base which is eccentrically arranged on the outer wall of the air inlet in a sleeving mode, a rotating device is arranged on one side of the inner wall of the bottom of the mounting base, the other end of the supporting rod is provided with filter screen pieces corresponding to the air inlet through an arc-shaped block, and one set of filter screen pieces are located at the top of the air inlet. When the PID monitoring equipment main body is used for monitoring and external gas enters from the gas inlet, the gas firstly passes through the corresponding port and then passes through the filter screen piece corresponding to the gas inlet to filter out dust and impurities, and then the gas enters the PID monitoring eq