I tested out the GMC-300E from Amazon and was pleasantly surprised. This unit is about 1/2 the price of my Soecks and it seems to work pretty well.
Where is gets cool is a commenter linked me to this site https://radmon.org/
The have a bunch of open source software and have a networked of linked dosimeters around the world. Neat collaborative project and a great use of everyone's Geiger counters when not in active use. Check it out.
All things environment from protection, conservation, forestry, climate change etc
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