PM2.5 CLASSIFIER FOR HIGH-VOLUME AIR SAMPLER MOUNTING

摘要

To provide a PM2.5 classifier for high-volume air sampler mounting that reduces re-scattering of coarse particles collected on a collision plate for a collision collection sheet to prevent a liquid from dropping from a periphery of the collision plate.SOLUTION: There is provided the PM2.5 classifier for high-volume air sampler mounting consists of a side plate, a skirt part projecting outward in an L shape from a lower part of the side plate, a top plate closing an upper part of the side plate, and a collision plate supported by the top plate, and is characterized in that: the skirt part has an engagement part for fixation to a high-volume air sampler body; the side plate is made of a transparent material; the top plate has a collision plate fixing part fixed in the center and also has a plurality of nozzle holes bored concentrically and closer to the center than an outer peripheral position of the collision plate; a nozzle surface part where the nozzle holes are bored is one stage recessed downward; and the collision plate is a disk shape having a raised part at an outer periphery, the raised part being located closely to an outer side of the downward recessed nozzle surface part of the top plate.SELECTED DRAWING: Figure 1