CAS to Become Part of Particle Measuring Systems

Spectris PLC, owner of Particle Measuring Systems, Acquires CAS Clean Air Service AG (CAS)

​​​​Spectris plc, a well-respected and long-established supplier of productivity-enhancing instrumentation and controls, has confirmed today that it has acquired CAS Clean Air Service AG (CAS), a leading full-service supplier of clean room measurement systems which has a strong customer base within Switzerland and the DACH region. CAS is based out of its headquarters in Wattwil, Switzerland, and also has five other sites in Stein, Switzerland, Vienna and Innsbruck, Austria and two in Germany. CAS will be fully integrated into Particle Measuring Systems (a Spectris Company), a global technology leader in the environmental monitoring industry and the largest particle counter manufacturer in the world, and the CAS name will become a product brand within PMS.

Established in 1989 in Wattwil, Switzerland , CAS a privately-owned Swiss company has become a leading provider of clean-room technology and it’s monitoring & advisory service have generated strong growth within the pharmaceutical manufacturing, medical technology, plastics technology, and optics markets. CAS is expected to continue to deliver strong growth leveraging PMS’s strong industry and channel leadership in contamination monitoring and in expanding its GMP Services knowledge and expertise to develop across Europe and Worldwide. More information on CAS can be found at

“This is a strategic move for Particle Measuring Systems,” says John Mitchell, President at PMS. “The acquisition of CAS fits perfectly with our strategy of expanding our presence with pharmaceutical manufacturers, and particularly with aseptic manufacturers. CAS will provide a strong presence in Switzerland and expands our base within the DACH region, provides a foundation to expand our GMP services business outside of DACH, and provides the opportunity for the CAS organization and brand to grow with PMS.”  

About Particle Measuring Systems

A global technology leader in the environmental monitoring industry, PMS, a subsidiary of Spectris plc, is a global technology leader in contamination monitoring,  the inventor of laser particle counting, and now is the leading provider of solutions for monitoring and controlling many forms of contamination that impact companies that manufacture in ultra-clean environments.

The products and technologies provided by Spectris’ businesses help customers to improve product quality and performance, improve core manufacturing processes, reduce downtime and wastage and reduce time to market. Its global customer base spans a diverse range of end user markets. Spectris operates across four business segments which reflect the applications and industries it serves: Materials Analysis, Test and Measurement, In-line Instrumentation and Industrial Controls. Headquartered in Egham, Surrey, United Kingdom, the Company employs over 8,000 people in more than 30 countries. For more information, visit

For more information on PMS, visit


Categories: Sciences, Industry News, Pharmaceuticals and Biotech

Tags: boulder, clean air services, colorado, environmental monitoring, particle counter, particle counting, particle measuring systems, spectris, wattwil

About Particle Measuring Systems

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A global technology leader in the environmental monitoring industry, PMS, a Spectris company, is the inventor of laser particle counting and the largest particle counter manufacturer in the world.

Particle Measuring Systems
5475 Airport Blvd. (Particle Measuring Systems)
Boulder, CO 80301
United States