I’m running Unit number 42000001 in Orlando, FL, USA and was having some trouble with my Unit – it’s a very old model, one of the first Radu produced and needs custom firmware, anyway, I removed it from it’s position outside and was running it in my basement office for a few minutes when I noticed CPM’s of 25-35. My avg outside, 20 feet away (and above ground level) is 5-7 CPM.
I have done a Radon test in my basement level before (although not in this particular room) and it came back ‘normal’.
Also, the unit is now back outside and it’s now reporting 15 CPM – significantly higher than it’s ever been before, out there.
So, how long before my hair falls out and I do an “Alexander Litvinenko” (i.e. die horribly)?
It may not be radon in the air, which most radon tests look for. It could be decays that are being picked up from the concrete or whatever your basement wall/floor is made out of. Go ahead and do a test where you put it on a granite counter top.. you’ll see similar readings. Depending on the surface you have it mounted to or set on top of, you could be picking up decay counts from that.