Ludlum Model 44-40
Alpha, Beta, Gamma GM Detector
Part Number: 47-1538
INDICATED USE: Alpha, beta, gamma survey; sample counting
DETECTOR: Pancake type halogen quenched GM
WINDOW: 1.7 + 0.3 mg/cm2 mica
WINDOW AREA: 15 cm2 active, 12 cm2 open
EFFICIENCY (4pi): 5%-14C; 22%-90Sr/90Y; 19%-99Tc; 32%-32P; 15%-239Pu
SENSITIVITY (137Cs gamma): 3300 cpm/mR/hr
ENERGY RESPONSE: Energy dependant, see curve below
BACKGROUND: 25 cpm
GAMMA FRONT TO BACK RATIO: 4 to 1
LEAD SHIELD THICKNESS: 0.500"
DEAD TIME: 80 microseconds
OPERATING VOLTAGE: 900 volts
CONSTRUCTION: Painted lead housing
SIZE: 4.5" H x 4" W x 6.5" L (11.4 x 10.2 x 16.5 cm)
WEIGHT: 5.5 lb (2.5 kg)
Click Here to Download a Printable Information Sheet. (.pdf format)
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