Model 3A Alarming Survey Meter
Ludlum Measurements

  • 4 Ranges
  • Utilizes G-M, or Scintillation Detectors
  • Typical Counting Range from 0 - 200 mR/hr, or 0 - 500,000 cpm
  • Built-In Alarm

PART NUMBER:48-1408

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)
ALARM: Indicated by red lamp on front panel and audio going to constant tone (NOTE: The alarm circuit on the Model 3A is triggered by meter deflection)
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 600 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

Suggested 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 44-7
Model 44-9
Model 44-88
Model 44-89
Model 44-94
Model 43-1
Model 43-2*
Model 43-5*
Model 43-65*
Model 43-90*
Model 44-94

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

Model 44-2
Model 44-3
Model 44-6
Model 44-7
Model 44-9
Model 44-38
Model 44-10
Model 44-17
Model 44-20
Model 44-21
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 Survey Meter to better determine the presence of a light leak.

Common Meter Dials

 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

 


 

 

 

 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
 

 


 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

 


 

 

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

 


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

 


 

 

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)


   

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

   

Accessories

Replacement Parts

Check Source
Source Holder
Overload Indicator
Scaler Option
Shoulder Strap
Headset
Standard Carrying Case
Air and Water Tight Carrying Case

 

Cables
Meter Bezel
Meter Movement
Handle
Probe Clip

Manual

 

Nuclear Instrumentation

Dosimetry Shielding Sources Specials

Hepa Vacuums

Chemical Detection

Marinelli Beakers

Fume Hoods

Accessories

Emergency Response

Nuclear Medicine

Radiation Therapy Search Home

Direct Scientific  /  tel (310) 589 0601 /   Email

contact us: en español, auf Deutsch
Open 8:00 AM - 5:00 PM Pacific Standard Time