Particle Measuring Systems

Particle Measuring Systems

Particle Measuring Systems as the global technology leader in the environmental monitoring industry, Particle Measuring Systems invests in research, engineering, manufacturing, and support of particle counting and monitoring instrumentation, microbial monitors, molecular gas analyzers, data management software. Our comprehensive instrumentation suite enables process-driven companies to monitor environmental quality and make fact-based decisions to improve process yield and meet regulatory requirements. Particle Measuring Systems equipment is used in monitoring applications across multiple industries by companies throughout the world. Our customers are concerned about the impact environmental contamination has on their products, processes, and equipment.

Company details

5475 Airport Blvd , Boulder , CO 80301 USA
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Business Type:
Industry Type:
Environmental Monitoring
Market Focus:
Globally (various continents)
Year Founded:

Particle Measuring Systems (PMS) sets the standard for cleanroom and clean manufacturing environmental and contamination monitoring and control. With more than 60 patents, we create the technology that enables you to make fact-based decisions, improve process yield and comply with changing regulatory requirements.

We understand the challenges our customers face, which is why we actively remain up to date with industry, trade, and technology changes.

With more than 500 employees, over 35 distributors, and local sales and services in more than 50 countries, we’re local everywhere.


Particle Measuring Systems is the largest particle counter manufacturer in the world. How did we accomplish this? Simple – we invented laser particle counters – a system that provides accurate data and results for clean room environments.

Since 1972, we reaffirm our technology leadership position by continually pursuing advanced detection technologies, and regularly releasing new products and adding services that focus on current challenges and future needs of the critical industries we serve.

Acquired by Spectris in 1996, Particle Measuring Systems is one of 13 operating companies focused on providing productive and enhancing instrumentation and controls.

Spectris is a leading supplier of productivity-enhancing instrumentation and controls. The Company’s products and technologies 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 approximately 8,300 people, with offices in more than 30 countries.

Learn more about our particle counting, microbial monitoring, and molecular contamination control through our Particle College® continuing education program.

Company culture is equally important to the technology our executives and technicians create. Whether we are interacting with our customers, employees or technology, Particle Measuring Systems is committed to eminent, professional, and respectable service.

Our values of restless innovation, empowerment, absolute integrity, customer focus and high performance drive our pursuit of excellence. We are proud to be a part of such a rewarding culture that promotes nothing less than ethical behavior and morals, at all levels and circumstances.

Learn more information about our career opportunities at Particle Measuring Systems.

Particle Measuring Systems’ mission statement is to be the differentiated leader for particulate contamination monitoring by improving the performance of clean manufacturers through the applications of superior technology, quality and service.

Why Choosing PMS is Best for You

Experts in Contamination Monitoring Solutions Since 1972 with presence around the globe

Superior Knowledge

Particle Measuring Systems (PMS) is the inventor of laser based-particle counting, and we continue to lead the field with our dedication to hiring and training industry professionals. Our experts are recognized as thought leaders, evidenced through our speaking requests, webinars, authored papers and high education levels.

Our technology experts actively participate with customers and industry standards committees to understand the evolving needs and challenges faced by our broad customer base. Our renowned Particle College® program includes a two-day series of lectures and hands-on labs covering basic particle measuring concepts to advanced applications of contamination monitoring and control.

Superior Technology

A core investment in research, engineering and product manufacturing has resulted in more than 60 patents related to our  products and applications. We create the technology that enables you to make fact-based decisions, improve yield process, and comply with changing regulatory requirements. Our technology can measure particle sizes as small  as 20 nm in water, 10 nm in air, and molecular contamination concentrations in parts per trillion. We are also leaders in microbial detection developing traditional techniques that reduce false positives and rapid techniques to improve speed and accuracy of detection.

Superior Quality

Particle Measuring Systems sets the standard for contamination monitoring by first designing reliability into our products and then backing the technology with an unmatched Quality Management System.

Superior Service

Our service technicians are well trained to calibrate your instruments to the highest standards, and our software-controlled approach automates critical steps that drive consistency in each calibration. This ensures the same calibration results and performance, consistent with factory calibration, regardless of where the calibration is performed- anywhere in the world.

All calibrations are completed in strict accordance with ISO guidelines. PMS provides an unequaled counting efficiency test for first-channel sensitivity. For pharmaceutical applications, particle counters must be calibrated to the exacting standard of ISO 21501-4:2007, which includes measurements to verify and set flow rate, counting efficiency, particle sizing, resolution, signal ratios and zero count. Each calibration is also completed using NIST-traceable standards, and a certificate is provided with each calibration.

At Particle Measuring Systems (PMS), as a global leader in contamination monitoring, we have been actively monitoring and reducing our environmental contamination over the last few years.

As part of our Corporate Social Responsibility (CSR) approach we have installed electric car charging stations on site, put in an ultra pure water (UPW) recycling system (that saves approximately 40% of UPW water use), and actively participate in Boulder’s zero waste program including implementing a composting program and training all Boulder employees.

Past CSR initiatives have included installing new lighting that reduces wattage used, eliminating white room air handles, and implementing a comprehensive recycling program that includes electronics. Areas where lighting has been changed have had a 41% reduction in watts used. The change was made my removing T-12 lighting and replacing it with T-8 high efficiency lighting.

The white room air handlers that PMS used in the past accounted for 17% of the building’s total electric bill. PMS was able to remove them and retrofit the space to deliver tempered air without them, with no additional energy consumption.

Since January 2013, Particle Measuring Systems has sent 21,550 pounds of electronics and parts/materials to a responsible electronics recycling company that de-manufactures electronics, and separates the components by category.  The items are then recycled and kept out of the land fills. PMS also recycles office paper on an individual basis as well as cardboard.

“We are participating in all these programs for several reasons,” said John Mitchell, President of Particle Measuring Systems, “it is the right thing to do, it saves us money, and it supports our employees and the environment”.

Please select any of the side buttons to view our policies in regards to environment management and/or health and safety at work.

Particle Measuring Systems is a Spectris Company, a leading maker of highly specialized measuring instruments and controls for some of the most technically demanding industrial applications.

Headquartered in the U.K., Spectris employs over 7,400 people in more than 30 countries worldwide. Spectris (SXS) is a member of techMARK, the London Stock Exchange’s index for technology companies, and the FTSE4Good index of socially responsible companies.

Credibility is a critical asset for Particle Measuring Systems to show and validate to our customers. Learn about our accreditations, awards and affiliations here:


ISO/IEC 17025:2017 Accreditation Certificate and Scope of Accreditation

International Organization for Standardization (ISO) 9001:2015

Awards and Credibility

Parenteral Drug Association (PDA)
Award, 2018
Certificate of Appreciation

Semiconductor International
Best Product, 2008
Air Sentry II: Airborne Molecular Contamination Monitor

Clean Rooms Contamination Control Technology
Award, 2006
Most Impressive Development/Implementation of Advance Technology

High Plains
Award, 2006
Completion of Organizational Profile in pursuit of Performance Excellence

Company of the Year, 2006
Significant Contributions to Colorado Photonics Industry

Semiconductor International
Best Product, 2006
Air Sentry IMS System: Airborne Molecular Contamination Monitor

Semiconductor International
Best Product, 2005
LASAIR II 110: Airborne Particle Counter

Gases and Technology
First Place, 2004
Innovation Award for Gas Analysis Product

Clean Tech Magazine
Technology of the Year Award, 2001

Quality policy

Our Quality Policy is to strive to meet or exceed the needs and expectations of our customers and to align the activities of all personnel with the common focus of customer satisfaction through continual improvement in the quality of our products, services and technical support. Particle Measuring Systems is ISO 9001:2008 certified.