PRM-470B

TSA’s hand-held PRM-470B is a popular choice for locating radioactive sources and measuring intensity in the field. It uses low power CMOS electronics to provide over 60 hours operation from the NiCad batteries. For emergency response or other applications where rechargable batteries are not suitable, the PRM-470B can be powered by optional 4 "AA" alkaline batteries. These batteries provide more than 12 hours of continuous service. The versatile, easy to operate PRM-470B also features a self test during power up, automatic background count and user determined alarm settings.

The PRM-470B has a motion switch to automatically switch from background to search mode when the instrument is moved. After the instrument has been at rest for 15 seconds, it will revert to background update. Internal switches are provided to scale the display to µsv/hr or µR/hr.

This conversion is not energy compensated. Therefore, the value displayed is only an approximation of actual dose rate.

Applications

PRM-470B applications include special nuclear material (SNM) searches at plant exits and material access areas, as well as contamination and background monitoring. The small size, light weight, and long battery life make it ideal for searching vehicles that require extended search times.

Specifications

SENSITIVITY:

Will detect 10g ²³⁵U (HEU) or 1g ²³⁹Pu when tested in accordace with ASTM Standard C 1237*.

DETECTORS:

One, 3.5"h x 2.88"w x 1.25"d (9 x 7 x 3cm) plastic scintillator detector; provides 12.6 in³ (206cc) of detector volume per instrument.

ALARM LEVEL:

Set by internal switches from 0.1 to 9.9 sigma

ALARM INDICATION:

Audible tone and LED

COUNT TIME:

Search mode: 0.05 sec. count with 0.4 sec. moving average.
Background time: 10 sec.

DISPLAY:

LCD, one line x 4 characters, with backlight

POWER REQUIREMENTS:

The internal NiCad battery pack provides more than 60 hours of continuous operation on a full charge. The instrument is shipped with a universal input battery charger which operates on 90 - 250 Vac, 47 - 63 Hz. Recharge time is less than 16 hours. Optional 4 "AA" alkaline batteries provide more than 12 hours of operation.

DIMENSIONS:

8"h x 5"w x 3"d (20 x 13 x 8cm)

WEIGHT:

2.4 lb (1.1kg) with batteries

ENVIRONMENTAL:

32° to 100°F (0° to 38°C)

* ASTM Standard C 1237-93 is available from TSA Systems, Ltd. or The American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428, (610) 832-9585.