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Handheld Survey Meters : Model 192 MicroR

Model 192 MicroR Ludlum
Model 192 MicroR Meter
PART NUMBER:48-2945

  • 4 Ranges
  • Automatically Adjusting Alarm Setting
  • Micro-processor based
  • Built-In 2" X 1" NaI (Tl) Gamma Scintillator
  • Total Counting Range from 0 - 5,000 µR/hr


  • INDICATED USE: Low level (microR) gamma survey
    DETECTOR: 2" X 1" sodium iodide (NaI)Tl scintillator
    SENSITIVITY: Typically 700 cpm/microR/hr (Cs-137 gamma )
    ENERGY RESPONSE: Energy dependent
    METER DIAL: 0 - 5 microR/hr, BAT TEST (others available )
    MULTIPLIERS: X1, X10, X100, X1000
    LINEARITY: Reading within plus or minus 10% of true value
    ALARM: The Model 192 has a dual action alarm.
    1. A fixed alarm point can be set at any point from 10% of full scale to full scale, and is indicated by a constant audible tone, and the lam p turning on.
    2. A quick deviation alarm that is based on background radiation levels. When the instrument is turned on, it takes an 8 second measurement of background radiation levels and determines a deviation alarm setting. If the radiation level exceeds this setting, the alarm audio will beep every 1/8 second, and the lamp will flash.
    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 )
    RESPONSE: Toggle switch for FAST (4 seconds) or SLOW (22 seconds) from 10% to 90% of final reading
    RESET: Push-button to zero meter, and also re-accumulate background data and recalculate the alarm deviation.
    POWER: 2 each "D" cell batteries (housed in sealed compartment that is externally accessible )
    BATTERY LIFE: Typically 600 hours with alkaline batteries (battery condition can be checked on meter )
    METER: 2.5" (6.4cm) arc, 1 mA analog type
    CONSTRUCTION: Cast and drawn aluminum with beige polyurethane enamel paint
    TEMPERATURE RANGE: -4º F(-20º C) to 122º F(50º C) May be certified for operation from -40º F(-40º C) to 150º F(65º C)
    SIZE: 7.8"(19.8 cm)H X 3.5"(8.9 cm)W X 8.5"(21.6 cm)L
    WEIGHT: 4.5 lbs(2.1 kg) including batteries

    Click Here to Download a Printable Information Sheet. (.PDF format)