Kingsley St. John Reavell

Fidion Ltd. is a British company founded in 2016 that specializes in providing scientific equipment and consultancy services to help customers solve challenges related to gas and particle measurements. The private company is based in Cambridge, UK and has subsidiaries in the United Kingdom. The company's expertise spans various fields such as combustion emissions, catalysis, filtration, metrology, medical devices, aerosol science, vaping, and process engineering applications. The company offers a range of innovative solutions to their customers to help them overcome their measurement challenges.

Part of Fidion Ltd., Cambustion Ltd. is a British scientific instrumentation company founded in 1987. The company is based in Cambridge, UK and offers ultrafast response gas and particulate analyzers for engine emissions, Particulate Filter Testing Systems, and Aerosol Science instrumentation. Cambustion has two groups, the Products group and the Powertrain Engineering Services group, both working with customers globally to solve challenges surrounding gas and particle measurements through a range of innovative scientific equipment and consultancy.