How to evaluate indoor radon using consumer-grade devices?

This short paper discusses the challenges posed by the Internet of Things (IoT) in indoor radon measurements. Until 2010, most radon measurements were carried out using passive dosimeters exposed over long-term periods (more than one month). However, this paradigm began to change in the 2010s, with the increasing availability of electronic radon devices enabling real-time monitoring for a wider population. Although this development has made radon more visible and better known to the public, it is important to note that significant performance differences exist among radon real-time measurement devices. These differences are notably related to the device brand, detection technique, and cost. This paper provides an overview of several intercomparison studies of radon measurement devices, which highlights the influence of environmental conditions, radon concentration levels, technologies used in the devices, as well as their long-term performance, on real-time radon devices’ performances.