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by killswitch
Mon Mar 03, 2014 3:41 pm
Forum: Geiger Counter
Topic: FAQ: Test sources
Replies: 8
Views: 23405

Re: FAQ: Test sources

Hi

Another test source i found that works is fertilizer. Ive got a bag of NPK powder mix and the K in it gives off about 80CPM's.

A pure bag of K before mixing will probably give off more.