A Trusted Contamination Control Partner

Business expansion and growing market needs for contamination control expertise broadened our operations into new sectors over recent years. In May 2023, we changed our company name to FMS (Facility Monitoring Systems Ltd) to better represent our business in those diverse and demanding markets where environmental monitoring is mission-critical and strong business relationships are essential. FMS is a Gold Channel Partner to industry-leading airborne particle counter manufacturer TSI Inc. and the exclusive UK partner to monitoring software platform developer ViGIE. FMS was formerly Validair Monitoring Solutions Ltd.

Diverse Market Expertise

FMS now operates across industrial and hi-tech sectors that include aeronautical, space, defence, automotive, semiconductor, graphene and EV battery gigafactories. We continue to deliver the high levels of service and support that have long been the hallmark of our business and remain pre-eminent in the pharmaceutical, healthcare and life sciences markets where we forged our exemplary reputation. Today, FMS provides world-class airborne particle counters, bespoke cleanroom monitoring system solutions and critical alarm systems in clean air and contamination-controlled environments. It’s all underscored by award-winning services that include the supply of particle counter and facility monitoring systems, on-site installations, instrument calibrations, technical expertise and acclaimed customer support. 

Unparalleled Experience

With over 250 combined years of environmental monitoring industry experience backed by UKAS ISO17025 accreditation for our laboratory temperature calibration services, and a track record second to none, our credentials speak for themselves. That experience reveals that one size does not fit all, which is why we collaborate closely with our customers to ensure that solutions from FMS are unbeatable in performance, value, reliability and operational life span.

Our Values

We ask our staff and partners to adopt and adhere to a series of positive personal values that are reflected in all our business interactions. We want FMS to continue to be a rewarding place to work and a great company for our customers to deal with.

Learn more about what we do.
Download our Competencies document.

“I would like to thank the company for a really prompt service. Many thanks.”

Subsea Operations Company

“I have a very good connection with everyone I have been in contact with at FMS. All very friendly, nothing is too much trouble and highly professional with a personal touch.”

Optical Products Company

“I have had contact on the phone and through email and I cannot fault their customer service. It is excellent. The returns of the goods is swift and hassle-free. Thank you.”

Subsea Operations Company

“Jon was very helpful and took the time to talk through the set-up. Amy is always prompt and helpful with email responses.”

Fertility Specialist Company

“FMS is one of the few companies I deal with who I have complete trust in. The quality of service I receive from all departments is excellent.”

Specialist Pharmaceutical Company

“Just wanted to say excellent work, well done all. The upgrade has been a really impressive piece of work the feedback is very positive and the changes made look great. Please pass on my thanks to everyone involved at FMS for their support, your efforts have been really appreciated.”

Pioneering Immunology Business


A comprehensive range of world-class airborne particle monitoring instruments and systems from TSI and ViGIE

Industry Sectors

Particle monitoring systems and expertise for cleanrooms and controlled environments in all industries.


Extensive range of bespoke contracts and exemplary customer support for all cleanroom, clean air and contamination-controlled environment applications.

UKAS Accreditation

Rigorous certification of FMS competency and compliance to reassure customers with our accredited temperature calibrations.

Talk to Us

Please get in touch to discuss your exact requirements and allow us to offer the best solutions.