This is just an overall question about home radon detectors. Where 10 years ago a topic like this might have seemed off topic (radon detection services sent specimen to labs - charcoal kits). It certainly seems now that the detectors can be accurate.
That is the nature of this question. How does a user get a detector for radon that is accurate? Not talking about bells and whistles but just the accuracy of the radon levels in the home and is there any agency (anywhere in the world) that has tested said accuracy.
Background on this...
Home inspector put a "detector" in the basement of a home I was about to sell. But its readings where high. I knew it was bunk, not because of the high ratings but because of the fluctuations. On day 3 - after it had been high the first two days - I aired out the basement. Opened all windows, big fans, opened the upstairs.
So I expected the levels to drop significantly. Then closing it off on day 4 to see them rise. Nope on day 3 the radon levels where the highest!
Then I am thinking, scam. So let's order the exact same detector from amazon... Comes in a day later. Plug it secretly 2 feet away. Radon levels within range - and vastly different from the other detector - on the EXACT SAME MODEL.
Long story short we had a radon testing service come out and measure. Radon levels were actually very low. Home inspector very embarrassed and I made him refund the buyers. But at same time I am like if I could get a detector for 100-200 I would rather just have them installed in the houses already. But then how do I know if they are accurate.....