Ludlum Measurements, Inc.  Ludlum Model 4906AB

  Hand and Foot  Radiation Monitor

 

 Introduction

 

Ludlum Model 4906AB Hand and Foot Radiation Monitor●  Alpha/Beta Radiation Hand and Foot Monitor

●  6 Alpha/Beta Gas Flow Proportional Detectors

●  Large LCD User Interface, Voice Prompts

●  Automatic Routines for Detector Setup/Alarm Calculations

●  Single-Hand Operational Mode

●  Built-in Ethernet Interface

●  Front Access to All Components for Repair/Calibration

 

The Ludlum Model 4906AB is a low cost, industrial duty, alpha and beta radiation contamination monitoring system for checking personnel hands and feet. A large color LCD presents users with the system status and points out any potential contamination in an easy-to-use manner. The system employs six gas flow proportional type radiation detectors with counting activated by optical switches. Alarms are annunciated locally and can be augmented with optional relays for signaling remote devices or a light stack mounted on top.  The built-in Ethernet interface supports connection to a network for gathering all count cycles and remote monitoring of the status. All maintenance can be performed from the front of the instrument. Detector access for quick replacement or repair is facilitated by hinged top covers.  The unit is equipped with rear-mounted wheels to facilitate transporting the instrument from one location to the next.

 

 Specifications

 

Ludlum Model 4906A Hand and Foot Radiation MonitorPART NUMBER: 48-3688

APPLICATION: personnel alpha beta radiation contamination monitoring

RADIATION DETECTORS: 6 gas flow proportional: 2 for feet and 4 to cover both sides of hands

COUNTING GAS: P-10 or equivalent

DETECTOR EFFICIENCY (4π):

Hand Detectors: 90S/90Y: 23%; 230Th: 15%

Foot Detectors: 90S/90Y: 11%; 230Th: 5%

DISPLAY: 12.1 in.  (30.7 cm) diagonal, TFT LCD SVGA

ELECTRONICS: fan-less motherboard running Embedded Windows™ XP

COUNT TIME: adjustable from 1-99 seconds

CONTROLS: LCD touch-screen facilitates all control functions with the exception of 1) power on/off button, 2) one hand operation button, 3) alarm acknowledgment button

CONSTRUCTION: welded aluminum, with powder coat finish, stainless steel base, and two offset wheels for portability

TEMPERATURE: 32 to 104 °F (0 to 40 °C )

HUMIDITY: 0-95% RH

POWER: 85-265 Vac, 24 W maximum

SIZE: 47.6 x 31.4 x 35.5 in. (121 x 79.8 x 90.2 cm) (H x W x D), step-up only 1.5 in. (3.8 cm) high

WEIGHT: 160 lb (72.6 kg)

 

     

 

 Options & Accessories

 

Pancake GM Frisker (Part Number 4420-420) This option provides a means of hand frisking personnel in the event an alarm is detected by the monitor to exactly locate the point of contamination. The kit includes, Ludlum's Model 44-9 GM pancake probe, detector cable, probe holder with built-in infra-red sensor and other miscellaneous components to integrate it into the Model 4906 system. The hand frisker detector automatically becomes activated upon lifting it out of the supplied detector holder so no special handling is required.

Ludlum Model 4906 Series GM Frisker

 

100 cm2 Frisker (Part Number 4420-445) This option provides a means of hand frisking personnel in the event an alarm is detected by the monitor to exactly locate the point of contamination. The kit includes, Ludlum's Model 43-143 gas flow proportional 100 cm² detector, detector cable, probe holder with built-in infra-red sensor, special gas/HV adapter and other miscellaneous components to integrate it into the Model 4906 system. The hand frisker detector automatically becomes activated upon lifting it out of the supplied detector holder so no special handling is required. The P-10 counting gas used to supply the monitors hand and foot detectors also supplies counting gas to the Model 43-143 probe. The gas is flowed through the detector HV/signal cable so no additional cables are required thus making frisking a lot more convenient. Gas flowed into the detector escapes through a small pin-size hole located at the top of the detector.

 

Ludlum Model 4906A Alpha/Beta Radiation Hand & Foot Contamination Monito

       

Model 4906A

Alpha Hand & Foot Monitor

       

 

 Technical Information

 

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