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Update:
I got the PRM-9000 today & it has been fascinating.
I don't have any old camera lenses to test but there are other objects.
I took some measurements of 2 types of Lead/Tin solder &
also a crystal vase which was the most radioactive I could find at my place.
I checked these against the background.
CPM = counts per minute.
The results are here:
Background 0.090uSv/hr 20 minute sample
background 28 CPM 5 minute sample
Solder Type A 0.230 uSv/hr 20 minute sample
Solder Type A 74 CPM 5 minute sample
Crystal vase 0.330 uSv/hr 5 minute sample
Crystal vase 121 CPM 5 minute sample
Solder Type B 0.130 uSv/hr 5 minute sample
Solder type B 53 CPM 5 minute sample
What do you all think?
As far as I can tell:
There is nothing there that is very radioactive but still I have found results above the background level from normal objects.
I would bet that all the results are caused by Pb 210.
cheers
Allan
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