Founded in 1972, Particle Measuring Systems is headquartered in Boulder, Colorado, USA, with global offices in China, Denmark, Italy, Japan, Singapore, and over 35 distributors providing local sales and service in more than 70 countries.As the global technology leader in the environmental monitoring industry, PMS invests in research, engineering, manufacturing, and support of: particle counting and monitoring; microbial monitors; molecular gas analyzers; data management and automation software.