Currently, this is the most popular question asked. Particle counts are taken perpendicular to the air stream, usually at working height. Some systems actually monitor the particle counts within 6 inches of the filter face. In either case, only clean undisturbed air is sampled. Particle generation occurs with movement. Humans, temperature and humidity, earth movements and molecular activities cause the particles on surfaces to move and become potential contamination.
No comments:
Post a Comment