ID: 
2335
Maker's Name: 
Precision Radiation Instruments Inc
Where made: 
USA
Dimensions: 
34.7 × 21.5 × 11.5 cm

The metal container is light-tight and excludes Alpha and Beta radiations. It contains electronics to detect and amplify the output from an external photo-multiplier tube. The unit requires an external power supply or internal batteries in the rectangular case.