24/7 Technical Support
Since 1962 Ludlum Measurements, Inc. (LMI) has been designing, manufacturing and supplying radiation detection and measurement equipment in response to the worlds' need for greater safety. Throughout its nearly 5 decade history, Ludlum has developed radiation detection technologies and instruments in support of enhancing the safety of personnel and the environment.
Ludlum

 

Ludlum Products

LUDLUM M-3 SURVEY METER W/44-2
LUDLUM M-3 SURVEY METER W/44-2
 

The Model 3 is a portable radiation survey instrument with four linear ranges used in combination with exposure rate, or cpm meter dials. The instrument features a regulated high-voltage power supply, unimorph speaker with audio ON/OFF capability, fast-slow meter response, meter reset button and six-position switch for selecting battery check or scale multiples of Xo.1,X1,X10 and X100. Each range multiplier has its own calibration potentiometer.


Ludlum 2241-2RK w/44-9 Probe
Ludlum 2241-2RK w/44-9 Probe
 

The Ludlum Model 2241-2RK is a portable general-purpose survey meter equipped with a Geiger-Mueller detector for measurement of alpha, beta and gamma radiation. The Model 2241 operated in either Ratemeter Mode with a moving decimal point and six-digit in Scaler Mode. The unit has both visual and audible alarms.


Ludlum192 Micro Rad Meter
Ludlum192 Micro Rad Meter
 

The Ludlum 192 Micro R Meter is a low level ( Micro R ) gamma meter. It features 4 ranges, auto adjust alarm settings and 2' x 1' sodium iodide (naI)T1 scintillator. The 192 Micro R Meter's sensitivity typically is 700 cpm/microR/hr (Cs-137 gamma ). This unit is micro-processor based and has total counting range from 0-5,000 µR/hr.


Ludlum Model 19 MicroR/Ratemeter
Ludlum Model 19 MicroR/Ratemeter
 

The Model 19 is a highly sensitive gamma R/meter employing an internally housed, 2.5 cm diameter by 2.5 cm  thick (1.0 x 1.0 in.) NaI detector. The measuring range is 0-50 v/h  (0-5000 R/hr).  The cast aluminum 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 five-decade range and instrument shut-off, an audio on/off switch, a fast/slow response switch, and pushbuttons for activating the meter lamp, high-voltage display, battery test, and count reset. 

Controls
  • Rotary knob selector: 0-25, 0-50, 0-250, 0-500, 0-5000 r/hr,  instrument off
  • Response: toggle switch for fast (4 seconds) or slow (22 seconds) from 10% to 90% of final reading
  • Audio: built-in unimorph speaker with on/off switch (greater than 60 db at 0.6 meters [2 ft])
  • High voltage: pushbutton to display hv setting on meter
  • Battery: pushbutton checks battery voltage
  • Reset: pushbutton to zero meter
  • Lamp: pushbutton to activate meter light
  • Calibration controls: accessible from front of instrument (protective cover provided)

 


Ludlum Model 3 (With 44-9 or 44-38 Detector)
Ludlum Model 3 (With 44-9 or 44-38 Detector)
 

This is Ludlum's best selling, general purpose, handheld analog ratemeter known for accuracy and long-lasting dependability. The analog meter comes in a variety of measurement ranges and units to support the external radiation detector selected.

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 four-decade range, instrument shut-off, battery test, an audio on/off switch, a fast/slow response switch, and a count reset button.


Ludlum Model 5 Geiger Counter
Ludlum Model 5 Geiger Counter
 
The Model 5 is a gamma exposure ratemeter equipped with two internally housed, energy-compensated GM detectors that measure over the range of 0-20 mSv/h (0-2000 mR/hr). 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 five display ranges and instrument shut-off, an audio on/off switch, a fast/slow response switch, and push-buttons for count reset and battery test. The Model 5 is a complete turn-key system and includes two ''D'' cell batteries.