Contamination monitoring for cleanrooms, airborne and liquid particle counters, microbial samplers, and molecular monitors, is the field Particle Measuring Systems (PMS) leads, serving pharmaceutical, semiconductor, and aerospace customers. Founded in 1972 and headquartered in Boulder, Colorado, the ISO 9001:2015-certified company holds more than 60 patents and operates in over 50 countries, ensuring compliance with standards such as EU GMP Annex 1 and ISO 14644, and providing advisory services and training via Particle College.