Radon detector by Airthings for $140
Lowest price I ever saw. I have it for number of years now, good device. Got it when first came up, for over $200. Batteries last forever, does not require annual recalibration, all time, 7 day and 24 hours averages (although I have questions on average calculations, I think it is bit off) .
Leave it for a month to have reliable result, 7 days minimum, dont be running around and complaining about the device after first result after 1 day shows data way off from what you expected.
Few friends borrowed it, few weeks at a time. Made them less worry.
https://www.amazon.com/exec/obido…00H2VOS
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