scope:

This part of ISO 11665 describes continuous measurement methodsfor radon-222. It gives indications for continuous measuring of thetemporal variations of radon activity concentration in open orconfined atmospheres. This part of ISO 11665 is intended forassessing temporal changes in radon activity concentration in theenvironment, in public buildings, in homes and in work places, as afunction of influence quantities such as ventilation and/ormeteorological conditions. The measurement method described isapplicable to air samples with radon activity concentration greaterthan 5 Bq/m3.