Pei, 5435 Airport Blvd, Boulder, CO 80301, US

Particle Measuring Systems is one of the global leaders in micro-contamination monitoring. The company offers a complete line of testing, training and consulting services to help meet its clients contamination monitoring needs. Particle Measuring Systems expertise is available to find contamination sources, test the cleanliness of parts, characterize processes and monitor cleanrooms. Dr. Robert Knollenberg, whose emphasis on elite technology drove the company s engineers to be the first to detect .05-micrometer particles in air and de-ionized water, and .065-micrometer particles in chemicals, founded Particle Measuring Systems in 1972. In January 1996, Particle Measuring Systems became a member of Spectris. In February 2004, the company acquired Molecular Analytics, a scientific, engineering and production firm with more than 15 years experience in ion mobility spectroscopy.