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.

1. A brand new battery gasket from Ludlum has been installed

2. Brand new BNC connector installed on the device

3. Pulse calibrated and dose rate checked and verified

4. General cleaning and maintenance

5. 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"