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Handheld Survey Meters : Model 15 Survey Meter

Model 15 Survey Meter Ludlum
Model 15 Survey Meter

PART NUMBER:48-1614
  • End Window G-M Detector for Alpha Beta and Gamma
  • BF3 Proportional Detector with Moderator for Neutron
  • 4 Ranges
  • Total Counting Range from 0 - 500,000 cpm


  • INDICATED USE: Fast and thermal neutron, alpha, beta-gamma survey
    DETECTORS: Controlled by selector switch
    NEUTRON: Model 42-9 BF3 proportional detector with 3"(7.6 cm) diameter cadmium lined moderator for fast neutrons (remove detector from moderator for thermal neutrons)
    ENERGY RESPONSE: Count response is not linear throughout energy spectrum (0.025 - 8 MeV)
    SENSITIVITY: Typically 60 cpm/mrem/hr (AmBe fast neutrons)
    GAMMA REJECTION: Less than 10 cpm through 10 R/hr
    ALPHA BETA-GAMMA: Model 44-7 thin end window G-M detector (others available)
    WINDOW: 1.7 plus or minus 0.3 mg/cm2 mica
    WINDOW AREA:
    Active - 6.4 cm2
    Open - 5.2 cm2
    EFFICIENCY(2pi geometry): Typically 5% - 14C; 20% - 90Sr/90Y; 15% - 239Pu
    SENSITIVITY: Typically 2100 cpm/mR/hr (137Cs gamma)
    METER DIAL: 0 - 500 cpm, 0 - 2.5 kV, BAT TEST (others available)
    MULTIPLIERS: X1, X10, X100, X1000
    LINEARITY: Reading within plus or minus 10% of true value
    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 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
    Page 1 of 2 Model 15 Neutron Meter
    2/10/2005 http://www.ludlums.com/product/m15.htm
    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: 12.5"(31.8cm)H X 3.5"(8.9cm)W X 8.5"(21.6cm)L
    WEIGHT: 8 lbs(3.7 kg) including batteries

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