Continuous Monitoring of Radon Gas Indoors

Monitoring Radon Gas Indoors

Radon is a naturally occurring radioactive gas that is present in the environment. In 1990 the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) published the Radon map of Australia.

This was updated in 2011 and at the time of writing there are plans to carry out a further update. 

Radon gas map of Australia


Typical radon levels in Australia are low, so for many buildings there is very little likelihood of radon gas being present. However, there may be a few geographical hot spots, where the continuous monitoring for the presence / level of radon gas may be beneficial. 

Radon originates from the decay of uranium in soil, rocks, and water. It can enter buildings through cracks in foundations, floors, and walls. 

The SARAD Radon Scout and Radon Scout PLUS are electronic radon monitors designed to measure radon gas concentrations indoors. These monitors utilise alpha spectrometry for radon detection. A semiconductor detector within the device detects these alpha particles, which are emitted as radon decays into other radioactive elements. 

Radon Scout and Radon Scout PLUS
Radon Scout and Radon Scout PLUS


The Radon Scout and Radon Scout PLUS continuously sample air from the environment. They draw in air through an inlet and pass it over the semiconductor detector. As radon atoms decay and emit alpha particles, these particles are detected by the semiconductor detector. This measurement is typically expressed in units such as becquerels per cubic meter (Bq/m³) or picocuries per liter (pCi/L). 

Measurements are recorded continuously, allowing for immediate awareness of any fluctuations or increases in radon levels. The data is logged, providing real-time data for analysis of indoor radon concentrations over time. Data can be transmitted wirelessly compatible devices, such as smartphones, tablets, or computers, for remote monitoring and data access. 

In Summary, the Radon Scout and Radon Scout PLUS are advanced radon monitors that utilise alpha spectrometry to measure indoor radon concentrations accurately. They play a crucial role in monitoring indoor air quality, ensuring safe living and working environments.  

For further information please contact ADM Nuclear Technologies. 

SARAD logo

10 July 2024