As a member of the project’s Industry Interest Group, DURRIDGE will be in attendance at the MetroRADON IIG meeting at PTB in Braunschweig, Germany on 18 June 2019. MetroRADON is a pan-European project aiming to develop reliable techniques and methodologies to enable SI traceable radon activity concentration measurements. For more information about the project, visit http://metroradon.eu/.