Vintage 1955 Precision Radiation Geiger Model 117B Special Scintillator Detector

Description

Precision Model 117B Special "Scintillator"
Vintage 1955
Like New Condition. Never Used. Comes with carrying case (missing strap)
The neon light on the top of the unit is a pilot light. It does not indicated radioactivity.
The Model 117B had a 1.5” diameter x 1” sodium iodide crystal.
It had six ranges of 0.025, 0.05, 0.24, 0.5, 2.5 and 5 mR/h.
It would give 65,000 counts per minute in a 1 mR/h field.
It was simple to operate and can be used by untrained persons. It was waterproof and tropicalized.
The photo tube and crystal are shock mounted.
A calibrated radium sample is provided for calibration in the field. It came with a saddle-grain leather carrying case. The unit requires four 1.5, one 22.5 and two 45 volt batteries.
The unit is 4-1/2 in x 7-1/4 in x 7 in and weighed 6-3/4 lbs.