Radon gas is a leading cause of Lung cancer. Charcoal test kits only give you a small window view to your Radon levels. Radon levels vary over the year and change with the weather. I've only been able to find one inexpensive electronic radon gas detector. Unfortunately it isn't set up to collect data. I wanted to work with the local schools to collect radon and weather data to correlate. shows how to connect a safety-siren radon detector to the Internet to log/graph the data.
Sunlight is by far a higher cancer risk than all the radon you ever get in contact with your entire life. But there are so many tools available to detect this radon gas levels. Do you ever tried any of those tools. if so let me know which one. i found this Tool https://beonhome.com/best-radon-detector/