The companies now offer a broader combined range of products and services, with expanded presence and technical service capabilities in the UK and Ireland.
LETCHWORTH GARDEN CITY, UK — 12 March 2026 — The UK office of Air Techniques International (ATI), a global leader in the design and manufacture of specialized test equipment for HEPA filters and protective masks, announced its acquisition of OptiCal Sciences Ltd. The companies have a well-established history in the supply of aerosol photometers and generators in the UK and Ireland.
OptiCal Sciences is a 30-year-old, family-owned business with offices in Northampton, UK and Carlow, Ireland. The company sells and services a range of products focused primarily on contamination control applications, including particle counters, environmental monitoring systems, biosafety cabinets, airflow test equipment, and aerosol photometers and generators.
ATI will retain the OptiCal Sciences offices and organisations in the UK and Ireland, operating under the leadership of ATI Director and General Manager, Rory McLellan. Commenting on the acquisition, Rory said, “We are excited about the combined capabilities of ATI and OptiCal Sciences. Our organisations share many values, including a strong customer-service ethos, and we now have a broader range of products and services to help our customers succeed.”
“When considering the next chapter of our business, we felt that ATI was the perfect fit,” said Ian Askew, former CEO of OptiCal Sciences. “ATI is a trusted global brand, and our long-standing relationship dates to our founding. We are very proud of our legacy of success at OptiCal Sciences, and equally excited to see our customers and organisation continue to thrive in the years ahead.”
About Air Techniques International
Air Techniques International (ATI), a division of Hamilton Associates, is a global leader in the design and manufacture of specialized testing equipment for HEPA filters, media, filter cartridges, respirators, and protective masks since 1961.
ATI UK office: +44 (0) 1462 676446 – or – salesUK@ATItest.com
Media contact:
Air Techniques International
Dave Fisher
Global Marketing Communications Manager
+1 410 363 9696 x6010
DFisher@ATItest.com