Geiger counters - different models?

Soldato
Joined
18 Mar 2008
Posts
12,751
As title:

can you get different quality Geiger counters? Maybe some that measure more accurately than others. Or a more accurate GM tube? Or is it just of a universal accuracy?
Thanks
 
Also: how would you be able to calculate the uncertainty of a Geiger counter? I imagine that with the one I've been using, it could be pretty significant, around 20-30% or even more
 
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