The AN/PDR-77 detects and measures alpha and x-ray radiation. It also detects and measures beta and gamma radiation. The system incorporates commercially available measurement electronics, an alpha probe, beta gamma probe, and x-ray probe. The radiac set has a digital LCD Display, is auto-ranging, and has settable audio and/or visual alarm thresholds. The radiac set is the primary radiac device to support the storage and movement of nuclear weapons, to respond to nuclear accidents, and to maintain Army equipment containing radioactive materials. The AN/PDR-77 has replaced the AN/PDR-56F and AN/PDR-60 which utilized 30 year old technology that was difficult and costly to support. Neither of the two systems were sensitive enough to accomplish the Army's alpha detection mission.
- Detect Alpha Particles and Low Energy x-rays at a level to permit safe maintenance of equipment with alpha sources.
- Required for nuclear weapon accident emergencies and routine monitoring for health and safety.
- Urgent need for 1432 units.
- Revised Abbreviated Performance Characteristics (APC) for Alpha Monitoring and Survey Meter, dated 4 Nov 91.
Basis of Issue: One-for-one replacement for the AN/PDR-56F and AN/PDR-60.
Production Deliveries Started: Jun 94
First Unit Equipped: Jul 94 (fielding now complete)
Type Classified Standard: Oct 94
Unit Price: $3,996 (Hardware)