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Radiation Survey Meters : Model 12-4 Neutron Counter

Model 12-4 Neutron Counter

Model 12-4 Neutron Counter


Model 12-4 Features:
  • 4 Ranges
  • Splashproof Shields
  • Dose Response
  • Total Range from 0 - 10,000 mrem/hr


Model 12-4 Specifications:

INDICATED USE: Neutron Survey

WORKING ENVIRONMENT: Splash proof shields for outdoor use

DETECTORS: 1.6 cm diameter X 2.5 cm thick BF3 detector surrounded by a 9"(22.9 cm) diameter cadmium loaded polyethylene sphere

SENSITIVITY: Approximately 30 cpm/mrem/hr ( AmBe neutrons )

NOTE: This unit provides an approximate inverse RPG curve for neutrons from thermal through 10 MeV

GAMMA REJECTION: Less than 10 cpm through 10 R/hr

AUDIO: Built in unimorph speaker with ON/OFF switch (greater than 60 dB at 2 feet )

METER DIAL: 0 - 10 mrem/hr, 0 - 2.5 kV, BAT TEST (others available )

MULTIPLIERS: X1, X10, X100, X1000

LINEARITY: Reading within plus or minus 10% of actual value

CALIBRATION CONTROLS: Accessible from front of instrument (protective cover provided )

HIGH VOLTAGE: Adjustable from 200 - 2500 volts (can be read on meter )

DISCRIMINATOR: Adjustable from 2 - 60 mV

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

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: 17"(43.2cm)H X 9"(22.9cm)W X 10.5"(26.7cm)L

WEIGHT: 21 lbs(9.5 kg) including batteries


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