Some feedback would be extremely useful at this phase. I will need to choose the best alpha radiation detector, both sensitive, shock resistant and low sized (have contacted radiation detector manufacturers already, hoping for an early reply).

Also the dust sensor is a bit problematic, since most of the off-the-shelf components are relatively big while using simple photoelectric principles. I can go for something custom, but preferably a readily available, calibrated component should be identified.

Finally the air tube depicted in the sketches should allow the temperature sensor to measure the outside temperature, while the porous filter should concentrate radon in close proximity for the alpha detector to do its measurements.

Suggestions are welcome!