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Tan metal Ludlum Model 3 Survey Meter with a black handle

Ludlum Model 3 Survey Meter only

Features a 4-range analog ratemeter and supports GM & Scintillation Type Detectors

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The Model 3 General Purpose Survey Meter features a 4-range analog ratemeter and supports GM & Scintillation Type Detectors. Known for its accuracy and long-lasting dependability, it comes in a variety of measurement ranges and units to support the external radiation detector selected. 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 four-decade range, instrument shut-off, and battery test, an audio on/off switch, a fast/slow response switch, and a count reset button. A 39" straight type detector cable with "C" style connector is included.

Specifications

  • Application: Alpha, Beta and Gamma surveying; Energy compensated GM (used with x 1000 scale only)

  • Internal Detector: Range 0-20 mSv/hr (0-2000 mR/hr); Sensitivity 200 cpm per mR/hr

  • Compatible External Detectors: Any GM or Scintillation operating on 900 VDC

  • Detector Channels:

    • External: x0.1 through x100 range settings

    • Internal GM: x1000 setting

  • Energy Response: within 15% of true value between 60 keV-3 MeV (internal detector only)

  • Linearity: reading within 10% of true value with detector connected

  • Meter Dial: 0-2 mR/hr, 0-5 kcpm, BAT TEST (others available)

  • Meter: 6.4 cm (2.5 in) arc, 1 mA analog type

  • Rotary Selector Switch: Switches between Off,

  • Ranges: x0.1, x1, x10, x100, x1000

  • Response Switch: Toggles between FAST (4 sec) or SLOW (22 sec) from 10% to 90% of final reading

  • Controls:

    • Battery Push Button: Checks battery status

    • Audio Switch: Audio on/off, built-in unimorph speaker, greater than 60 dB at 0.6 meters (2 ft)

  • High Voltage: 900 Vdc

  • Threshold: -40 mV to 10 mV

  • Temperature Range: -20 to 50o C (-4 to 122o F)

  • Relative Humidity: < 95%

  • Power: 2 each “D” cell batteries

  • Battery Life: Typically greater than 2000 hours

  • Construction: Cast and drawn aluminum with beige powder coat

  • Connector: Series “C” (others available)

  • Size: 6.5″>

  • Weight: 3.5 lb (including batteries)

Item Numbers

051-016 Model 14C Survey Meter, only Probe not included

051-013 Model 14C + 44-9 Pancake Probe (check source & holder not included)

051-014 Model 14C + 44-7 End Window Probe (check source & holder not included)

051-4438 Model 14C + 44-38 Energy Comp Probe (check source & holder not included)

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