Model 3 Survey Meter
Ludlum Measurements
The Ludlum Model 3 Survey Meter is the industry standard of radiation
survey meters. The meter has a rugged design and microprocessor
electronics. With proper care, the Ludlum Model 3 will last decades.
It operates on two "D" cells for approximately 2000 hours. The Ludlum Model 3
has adjustable high voltage to 1500
volts and includes external calibration controls. The four counting ranges are x0.1, x1, x10,
x100. (Dual scale, mR/hr & cpm available on special request.) Typical Counting Range
is from 0 - 200 mR/hr,
or 0 - 500,000 cpm. The Ludlum Model 3 is supplied as shown with built-in
speaker, strain relief cable, probe clip-on handle, two "D" cell batteries and
standard factory calibration. Model 44-3 or 44-2 gamma scintillator probes and
many others can
also be used with this meter.
Try the new lighter weight Model GSM-500, featuring auto-ranging, integration, and all-microprocessor circuitry.
Waterproof Pelican Cases
Available
- 4 Ranges
- Utilizes G-M, or Scintillation Detectors
- Typical Counting Range from 0 - 200 mR/hr,
or 0 - 500,000 cpm
- Greater Than 2000 Hour Battery Life
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Ludlum Model 3 Survey Meter |
Ludlum Model 3 Survey Meter with 44-9 Pancake Probe |
INDICATED USE: General purpose survey
COMPATIBLE DETECTORS: G-M, scintillation
METER DIAL: 0 - 2 mR/hr, or 0 - 5k cpm, BAT TEST (others
available)
MULTIPLIERS: X0.1, X1, X10,X100
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)
CALIBRATION CONTROLS: Accessible from front of instrument (protective
cover provided)
HIGH VOLTAGE: Adjustable from 200 - 1500 volts
THRESHOLD: 30 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
polyurethane enamel paint
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 |
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Ludlum Model 3 Common Meter Dials |
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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 |
202-664
0-6.6k cpm; 0-20 mSv/h
For Model 44-9; 44-9-18;
44-40; 44-88; 44-89; 44-94 |
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202-627
0-2 mR/hr
For Model 44-9; 44-9-18;
44-40; 44-88; 44-89; 44-94 |
202-889
0-20 mSv/h
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 |
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202-676
0-4k cpm; 0-20 mSv/h
For Model 44-7 |
202-085
0-2 mR/hr
For Model 44-7 |
202-393
0-20 mSv/h
For Model 44-7 |
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202-084
0-2 mR/hr
For Model 44-6; 44-38 |
202-379
0-20 mSv/h
For Model 44-6; 44-38 |
202-241
0-2 mR/hr; 0-2.4k cpm
For Model 44-6; 44-38 |
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202-546
0-20 mSv/h;
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 |
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202-740
0-0.5 mSv/h
For Model 44-2 |
202-212
0-5 mR/hr;
0-3500 cpm
For Model 44-3(I-125) |
202-570
0-50 mSv/h;
0-3.5k cpm
For Model 44-3(I-125) |
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202-717
0-5 mR/hr
For Model 44-10 |
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COMMONLY USED DETECTOR PROBES for the
Ludlum Model 3:
*For Mylar window scintillators it is strongly
suggested that the optional overload indicator be used on the Model 3
Survey Meter to better determine the presence of a light leak.
AVAILABLE ACCESSORIES
Cables , Meter Dials, Check Source And Holder, Carrying Case, Overload Indicator,
Scaler Option, Shoulder Strap
Ludlum Model 3 Manual
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Direct Scientific tel (310) 589 0601 fax (310) 919-2981, Email
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Open 8:00 AM - 5:00 PM Pacific Standard Time |