Ludlum Medical Physics Model 3/Model 44-9

  Radiation Survey Meter with Pancake Probe

Introduction

This is Ludlum’s best selling general purpose, handheld analog ratemeter known for accuracy and long lasting dependability. When connected to the Model 44-9 pancake detector, this system simultaneously detects alpha, beta and gamma radiation making it an excellent choice for Medical and Health Physics applications.  The analog meter face supports an operating range of 0 - 200 mR/hr for measuring gamma exposure rate and 0 - 660 kcpm for alpha/beta/gamma.  With the addition of the Model 180-2 sample holder,  it can also  be used to make a quick evaluation of wipe test surveys in the Nuclear Medicine department.  When ordered together, the Model 3 and 44-9 Probe includes a 39” long interconnecting cable, and is shipped calibrated and ready for use.

Specifications

MODEL 3 RATEMETER

PART NUMBER: 48-1606                            
MULTIPLIERS: X0.1, X1, X10,X100
RANGE: 0-200 mR/hr, and 0-660,000 counts/minute (cpm)
LINEARITY: Reading within 10% of true value with detector connected
AUDIO: Built in unimorph speaker with ON/OFF switch (greater than 60 dB at 2 feet)
HIGH VOLTAGE: Adjustable from 400 - 1500 volts
THRESHOLD: Fixed at 40 mV ± 10 mV
RESPONSE: Toggle switch for FAST (4 seconds) or SLOW (22 seconds) from 10% to 90% of final reading 
POWER: 2 each “D” cell batteries (housed in externally accessible sealed compartment)
BATTERY LIFE: Typically greater than 2000 hours with alkaline batteries
TEMPERATURE RANGE: -4°F to 122°F (-20°C to 50°C)
SIZE: 6.5” H x 3.5” W x 8.5” L (16.5 x 8.9 x 21.6 cm)
WEIGHT: 3.5 lbs. (1.6 kg) including batteries

MODEL 44-9 PANCAKE DETECTOR

PART NUMBER: 47-1539
WINDOW: 1.7 ± 0.3 mg/cm² mica
WINDOW AREA: Active - 15 cm²;  Open - 12 cm²
EFFICIENCY(2pi): Typically 5%-¹⁴C; 22%-⁹⁰Sr/⁹⁰Y; 19%-⁹⁹Tc; 32%-³²P; 15%-²³⁹Pu
SENSITIVITY: Typically 3300 cpm/mR/hr (¹³⁷Cs gamma)
ENERGY RESPONSE: Energy dependent
DEAD TIME: Typically 80 μs

Options