Dustiness test setup: scientist uses a continuous drop rig with CPC and ELPI, rotating drum visible

This lab scene shows a dustiness test per EN 15051 and EN 17199-4. A rotating drum and a continuous drop rig run under controlled airflow. A CPC tracks number concentration. An ELPI provides size-resolved counts. A cyclone filter captures the respirable mass. The image illustrates mass and number metrics in one dustiness test workflow.