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Ludlum Model 3

Radiation Survey Meter

Features

Low Price
Rugged
4 Decade Analog Ratemeter
Supports G-M and Scintillation Type Radiation Detectors
Greater Than 2000 Hour Battery Life

Introduction

This is Ludlum's best selling general purpose, handheld analog ratemeter known for accuracy and long lasting dependability. The aluminum cast instrument housing with its separate battery compartment and accompanying metal handle offer an industrial robustness and quality that promote long lasting protection and instrument life. The front panel controls include a rotary switch for selecting the 4 decade range, instrument shut off and battery test, an audio on/off switch, a fast/slow response switch and a count reset button. The analog meter comes in a variety of measurement ranges and units to support the external radiation detector selected. A 39" long straight type detector cable with "C" style connector is include in the price of the instrument.

Specifications

PART NUMBER: 48-1605

INDICATED USE: General purpose radiation survey
COMPATIBLE RADIATION DETECTORS: G-M, scintillation (see list below)
METER FACE: 0 - 2 mR/hr, or 0 - 5k cpm, BAT TEST (others available - see list below)
METER: 2.5" (6.4 cm) arc, 1 mA analog type
MULTIPLIERS: X0.1, X1, X10,X100
RANGE: Typically 0-200 mR/hr, or 0-500,000 counts/minute (cpm)
LINEARITY: Reading within 10% of true value with detector connected
CONNECTOR: Series "C" (others available)
AUDIO: Built in unimorph speaker with ON/OFF switch (greater than 60 dB at 2 feet)
ALARM: No (See Model 3A for alarm)

CALIBRATION CONTROLS: Accessible from front of instrument (protective cover provided)
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 RESET: Push-button to zero meter
POWER: 2 each "D" cell batteries (housed in sealed compartment that is externally accessible)
BATTERY LIFE: Typically greater than 2000 hours with alkaline batteries (battery condition can be checked on meter)
METER: 2.5" (6.4 cm) arc, 1 mA analog type
CONSTRUCTION: Cast and drawn aluminum with beige powder-coat
TEMPERATURE RANGE: -4°F(-20°C) to 122°F(50°C)
May be certified for operation from -40°F(-40°C) to 150°F(65°C)
SIZE: 6.5" (16.5 cm) H X 3.5" (8.9 cm) W X 8.5" (21.6 cm) L
WEIGHT: 3.5 lbs. (1.6 kg) including batteries

This Product is CE Certified

Compatible Radiation Detectors

Compatible radiation detectors are listed below and are not included with the survey meter price. An additional charge will be added for each detector ordered.

For Alpha

Detection

For Beta
Detection

For Gamma
Detection

For Alpha/Beta/Gamma Detection

Model 43-1*
Model 43-2*
Model 43-5*
Model 43-65*
Model 43-90*

Model 43-92*
Model 44-7
Model 44-9
Model 44-88
Model 44-89

Model 44-9

Model 44-1*
Model 44-6
Model 44-7
Model 44-9
Model 44-21
Model 44-38
Model 44-88
Model 44-89
Model 44-94
Model 44-116*

Model 44-142*

Model 44-172*

Model 44-2
Model 44-3
Model 44-7
Model 44-9
Model 44-10
Model 44-17
Model 44-20
Model 44-21
Model 44-38

Model 44-62

Model 133-2
Model 133-4
Model 133-6
Model 133-7
Model 133-8

Model 44-7
Model 44-9
Model 44-88
Model 44-89
Model 44-94

*For Mylar window scintillators it is strongly suggested that the optional overload indicator be used on the Model 3 Radiation Survey Meter to better determine the presence of a light leak.

Meter Faces


202-002 0 - 5k cpm For Any Detector	202-608 0-6.6k cpm; 0-2 mR/hr For Model 44-9; 44-9-18; 44-40; 44-88; 44-89; 44-94	202-627 0-2 mR/hr For Model 44-9; 44-9-18; 44-40; 44-88; 44-89; 44-94

202-330 0-4k cpm; 0-2 mR/hr For Model 44-7	202-085 0-2 mR/hr For Model 44-7	202-084 0-2 mR/hr For Model 44-6; 44-38

202-241 0-2 mR/hr; 0-2.4k cpm For Model 44-6; 44-38	202-654 0-50 mR/hr; 0 - 8.5k cpm For Model 44-2	202-666 0-50 mR/hr For Model 44-2

202-717 0-5 mR/hr For Model 44-10