[Milsurplus] R390 Meter?

[David Stinson]

For those that might be curious:  

The “390” (392?) meter reads .4 mR/Hr contact.  I have an old 30s radio compass indicator that does a full 1 mR/Hr, but the “hot mama” is one of those “TUNE FOR MAX” meters with the glass missing.  I have the hole covered with heavy clear packing tape to keep the dust out of the air.  It reads 2 mR/Hr.    

 

Some context from this ex-Nuke worker:  

 For the average person to show an effect from prompt radiation exposure:

Dosages are in Roentgen Equivalent Man (Rem)

• 0-25 No injury evident. First detectable blood change at 5 rem. 
• 25-50 Definite blood change at 25 rem. No serious injury. 
• 50-100 Some injury possible. 
• 100-200 Injury and possible disability. 
• 200-400 Injury and disability likely, death possible. 
• 400-500 Median Lethal Dose (MLD) 50% of exposures are fatal. 
• 500-1,000 Up to 100% of exposures are fatal. 
• 1,000-over 100% likely fatal.

 

The little meter is producing about .004 REM/Hr.  Not a danger unless one eats/breathes the paint.

 

GL OM ES 73 DE Dave AB5S

 

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