Ludlum Model 3 + HP-260 Pancake Probe
Model: Ludlum Model 3
Detection Range: 0-600,000 CPM
0-200 mR/h (0- 2 mSv/h)
Low/Medium Level Radiation / Radioactive Contamination Detection (α/β/γ)
Condition: Used, Calibration Verified 2024 & Operational, Original Parts, Refurbished
Power Supply: Requires 2, 1.5v D Cell Batteries (Not Included).
Specs:
Range: 0-200 mR/h (0-2 mSv/h) 0-600,000 CPM
X0.1] 0-0.2 mR/h (0-2 uSv/h) 0-600 CPM
X1] 0-2 mR/h (0-20 uSv/h) 0-6,000 CPM
X10] 0-20 mR/h (0-200 uSv/h) 0-60,000 CPM
X100] 0-200 mR/h (0-2 mSv/h) 0-600,000 CPM
*This Ludlum Model 3 is Calibrated for the 44-9 Pancake Probe with a 3,200 CPM to 1 mR/h ratio. Any other probe used with the Model 3 will only yield accurate readings on the CPM scale.
Features:
Battery Check
Audio ON/OFF
Fast/Slow Response Time
Needle Reset
Carrying handle
Dust and water resistant
Audio is via internal speaker
C Connector
*** This particular model has been cleaned and refurbished.
A brand new battery gasket from Ludlum has been installed
Brand new BNC connector installed on the device
Pulse calibrated and dose rate checked and verified
General cleaning and maintenance
Paint chipping and signs of corrosion near switches
*Red check source disc not included, used for demonstration purposes only.
Description from Ludlum’s website
Application Alpha, Beta, and Gamma surveying
Compatible Detectors GM, Scintillation
Detection Range Dependent on detector
Linearity Reading within 10% of true value with detector connected
Meter Dial 0 - 2 mR/hr, or 0 - 600 kcpm, BAT TEST
Controls
Rotary Selector Switch: Switches between: Instrument off; Battery check; Ranges: x0.1, x1, x10, x100
Response Switch: Toggles between FAST (4 s) or SLOW (22 s) from 10% to 90% of final reading
Reset Pushbutton: Zeroes meter
Audio Switch: Audio on/off, built-in unimorph speaker, greater than 60 dB at 0.6 meters (2 ft.)
Calibration Controls: Accessible from front of instrument (protective cover provided)
High Voltage Adjustable from 400 to 1500 Vdc
Threshold Fixed at -30 mV ± 10 mV
Temperature Range -20 to 50 °C (-4 to 122 °F)
May be certified for operation from -40 to 65 °C (-40 to 150 °F)
Power Two each "D" cell batteries housed in externally accessible sealed compartment
Battery Life Typically greater than 2000 hours with alkaline batteries (battery condition can be checked on meter)
Connector Series "BNC"
