radon detector
https://bluecircuitry.com/s/1rtMYtAvMmtzSGP5WVffx
A radon detector sits quietly in the corner of the basement, its small screen glowing with a number that tells you whether the air you're breathing is safe. It's a simple device, but it does something crucial: it measures the invisible, odorless radioactive gas that seeps up from the ground into homes. Some models beep if levels get high, others just log data over time, but all of them give you the peace of mind that comes from knowing what's actually in your air.