IM-94/PD Pocket Dosimeter (ca. 1950s)
The IM-94/PD is a military direct reading pocket dosimeter that measures gamma ray and X-ray exposures in the 0-100 roentgen range. This particular example was manufactured by Arnold O. Beckman. While it is referred to in the Directory of Radiac Equipment (page date April 1958), the 1966 version of the List of Military and Civil Defense Radiac Devices makes no mention of it. The 1975 List of Radiacs in the Navy Program states that the IM-94 was obsolete.
Size: 0.5” diameter and 4.5” long
Weight: 0.7 oz.
Manufacturer: Arnold O. Beckman (contract date 1952).
Charger to be used: PP-311/PD, PP-354B or higher
- Directory of Radiac Equipment NAVSHIPS 94200.5, no date, ca. 1961-62.
- Defense Atomic Support Agency, List of Military and Civil Defense Radiac Devices. DASA 1243 revised, 1966.
- Naval Electronic Systems Command List of Radiacs in the Navy Program P-9670-1, February 1975.
- Defense Nuclear Agency List of Military and Civil Defense Radiac Devices HQDNA (AR) 3M Revised, August 1987.