Radiacmeter
IM-195/PDR-27Q
IM-195/PDR-27Q
Measures 0 - 500 milliroentgens Per Hour / 4 Range Scales
Measures Gamma, Detects Beta. / Uses 2 Geiger Mueller Tubes
Manufactured By: Electro-Neutronics
Uses 6 "D" size 1½ volt batteries. Dimensions: 11½" x 54" x 6"
Serial Number : B-319
Government cost in 1969: $147.75
No case with this Radiacmeter
You get a close-up view of the Dual Geiger Mueller probe / beta shield open.
The large (5980/BS-2) GM tube is used for the 0-0.5 mr/hr & 0-5 mr/hr ranges.
The small (5979/BS-1) GM tube is used for the 0-50 mr/hr & 0-500 mr/hr ranges.
And... the ID tag.
Inside View
This unit is complete and working.
Tube Location Chart & Schematic
Dual GM Tube Breakdown
Note: The AN/PDR-27 series has been replaced by the AN/VDR-2.