[Milsurplus] Clear protective spray on panels?

[WA5CAB at cs.com]

FWIW, 2 mR/hr is the boundary level at which placards had to be placed when 
doing industrial radiography, and for instrument calibration benches (or 
used to be - I haven't kept up with the regs since I stopped having to worry 
about Cesium, Irridium or Cobalt sources).  Also, when measuring surface 
conditions, as on a meter glass, it's important to know where in the instrument 
the detector actually is.  Because the dose rate varies by the inverse 
square law, at distances under a few inches you can get significantly different 
readings with different model instruments.

In a message dated 7/3/2009 11:58:14 AM Central Daylight Time, 
nerd at verizon.net writes: 
> I have an old altimeter which is pretty "hot" from the radium on the 
> dial, it gets about 2 mR through the glass.  The thorium mantles for 
> Coleman stoves will do about 0.5 mR.  Other than that I can measure a 
> little higher than normal activity from the granite countertops in the 
> condo I'm renting and that's all I have ever found.  I'm always looking 
> for examples of radioactivity but not too much around!  (I obviously 
> don't keep the altimeter close to me!)
> 
> Btw, I have one of those PDR-27 counters, a later model which is all 
> solid state.  It hasn't been calibrated but agrees pretty well with one 
> that was current so it is probably in the ballpark.
> 
> Peter
> 
> 
> 
> Michael Tauson wrote:
> >On Fri, Jul 3, 2009 at 5:57 AM, Mike Morrow<kk5f at earthlink.net> wrote:
> >   
> >>Good God...this is the stuff of Art Bell and Mother Earth News!
> >>     
> >
> >Ahhh ... but it's good fodder for SF writers too.  God bless the
> >conspiracy theorists; they keep coming up with cooler story lines than
> >a lot of authors do.  ;-)
> >

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480