International Standard
ISO 11665-1:2019
Measurement of radioactivity in the environment — Air: radon-222 — Part 1: Origins of radon and its short-lived decay products and associated measurement methods
Reference number
ISO 11665-1:2019
Edition 2
International Standard
Read sample
ISO 11665-1:2019
Published (Edition 2, 2019)

ISO 11665-1:2019

ISO 11665-1:2019
CHF 151
Convert Swiss francs (CHF) to your currency


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.

General information

  •  : Published
     : 2019-09
    : International Standard under systematic review [90.20]
  •  : 2
     : 33
  • ISO/TC 85/SC 2
    17.240  13.040.01 
  • RSS updates

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)