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Ludlum Model 12-4 Neutron Counter |
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PART NUMBER:48-1200 |
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| 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: -4° F(-20° C) to 122° F(50° C) May be certified for operation from -40° F(-40° C) to 150° F(65° 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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Common Meter Dial |
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