The Continuous Ambient Mass Monitor (CAMM) measures fine particle mass (PM2.5) by determining the increase in pressure drop across a membrane filter during particle sampling.
The Harvard Ambient Particle Concentrator (HAPC) is designed to deliver concentrated ambient fine particles (size 2.5 µm) for conducting animal and human exposure studies.
The chambers designed at the Harvard School of Public Health are constructed of stainless steel, with large reinforced thick transparent plastic windows for maximum visibility during exposure experiments.