EN ISO 11665-1:2019

This document outlines guidance for measuring radon-222 activity concentration and the potential alpha energy concentration of its short-lived decay products in the air.The measurement methods fall into three categories:a) spot measurement methods;b) continuous measurement methods;c) integrated measurement methods.This document provides several methods commonly used for measuring radon-222 and its short-lived decay products in air.This document also provides guidance on the determination of the inherent uncertainty linked to the measurement methods described in its different parts.