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 2.GQ Geiger Muller Counter
 Mistake on the "Nuclear Radiation Safety guide" ?
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Posted - 09/24/2016 :  10:21:07  Show Profile  Reply with Quote

I've just received my GMC-320 Plus ordered a few days ago on Amazon. In the box, I got a little plastic card titled "Nuclear Radiation Safety Guide", with values in CPM, ySv/h and mR/h, and the corresponding action to take.

What is really strange is the >2000CPM line corresponds to >500ySv/h. Which seems way off from what the GMC-320 would measure, because the GMC-320 gives a value of 10-14ySv/h for around 2000CPM (I don't remember the exact value). Which is much less than the 500ySv/hr on the card.

So... is the card made for a different geiger tube ? Maybe a pancake tube which is way more sensitive and big ?

What value is more "realistic" to the action written besides it. The CPM column ? The ySv/h column ?

Image Insert:

174456 bytes
Reply #1


1115 Posts

Posted - 09/29/2016 :  19:28:28  Show Profile  Reply with Quote
Those value between columns are not directly mapped by value. Those are reading examples.

However, to make more sense, it should mapped by conversion rate.

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1 Posts

Posted - 08/10/2017 :  17:05:50  Show Profile  Reply with Quote
Is there a place to download the correct values I can then print out
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Posted - 08/24/2017 :  15:19:44  Show Profile  Reply with Quote
Originally posted by irwing

Is there a place to download the correct values I can then print out

Not sure if you wanted text or image- but this is an image of updated card I received with recent purchase.

I don't know how to make it an inline image, sorry.

Download Attachment:

GMC-300Re 4.22
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