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 2.GQ Geiger Muller Counter
 Gmc 320 V5 High Background Readings

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T O P I C    R E V I E W
Boyalon Posted - 08/27/2019 : 00:55:31
I just bought a new GMC 320 v5. It is always giving high readings above 0.20 usv. Is it possible that my geiger counter is contaminated? Maybe during factory calibration with radioactive source?
3   L A T E S T    R E P L I E S    (Newest First)
EmfDev Posted - 08/27/2019 : 11:24:57
We're not sure yet. Where is it 50 CPM? Have you tested it outside or other places?
Boyalon Posted - 08/27/2019 : 10:55:59
About 50 cpm. Maybe because of radon?
EmfDev Posted - 08/27/2019 : 09:31:48
Hi Boyalon, what is the CPM in your unit? Have you tested it somewhere else? It's impossible that it got contaminated during factory calibration.

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