BSENIS011665-5:2020 BSl Standards Publication Measurement of radioactivity in the environment - Air: radon-222 Part 5: Continuous measurement methods of the activity concentration bsi. BSENIS011665-5:2020 BRITISH STANDARD National foreword This British Standard is the UK implementation of ENIS0 11665-5:2020. It is identical to IS0 11665-5:2020.It supersedes BS EN IS0 11665-5:2015, which is withdrawn. TheUKparticipationinitspreparationwas entrusted to Technical Committee NCE/2, Radiation protection and measurement. A list oforganizations represented on this committee can be obtained on requestto its secretary. This publication does not purport to include all the necessary provisions ofacontract.Users areresponsibleforits correctapplication. @TheBritish Standards Institution 2020 Published by BSI Standards Limited 2020 ISBN9780539012255 ICS13.040.01; 17.240 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29February 2020 Amendments/corrigendaissuedsincepublication Date Text affected EN IS0 11665-5 EUROPEANSTANDARD NORME EUROPEENNE EUROPAISCHE NORM February 2020 ICS 17.240 Supersedes EN IS0 11665-5:2015 English Version Measurement of radioactivity in the environment - Air: radon-222 2 - Part 5: Continuous measurement methods of the activityconcentration (IS011665-5:2020) Mesurage dela radioactivite dans I'environnement Ermittlung der Radioaktivitat in der Umwelt - Luft: -Air: radon 222 - Partie 5: Methodes de mesure en Radon-222-Teil 5: Kontinuierliches Messverfahren continudeTactivitévolumique (IS0 11665-5:2020) fur dieAktivitatskonzentration (IS011665-5:2020) This European Standard was approved by CEN on 20 January 2020. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status ofa national standard without any alteration. Up-to-date lists and bibliographical or to any CENmember. This European Standard exists in three official versions (English, French, German). A version in any other language made bytranslation under theresponsibility ofa CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,Poland, Portugal, Republic ofNorth Macedonia,Romania, Serbia, Slovakia, Slovenia, Spain, Sweden Switzerland, Turkey and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG CEN-CENELEC Management Centre: Rue dela Science 23, B-1040 Brussels 2020CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11665-5:2020: E worldwide for CEN national Members