Ludlum Model 44-94
Alpha, Beta, Gamma GM Detector
Part Number 47-2390

INDICATED USE: Alpha, beta, gamma survey
DETECTOR: 4 ea. pancake type halogen quenched GM
WINDOW: 1.7 + 0.3 mg/cm² mica
WINDOW AREA: 62 cm² active; 50 cm² open
SENSITIVITY: Typically 13,200 cpm/mR/hr
BACKGROUND: 240 cpm
EFFICIENCY (4pi): 5%-¹⁴C; 22%-⁹⁰Sr/⁹⁰Y; 19%-⁹⁹Tc; 32%-³²P; 15%-²³⁹Pu
ENERGY RESPONSE: Energy dependent
OPERATING VOLTAGE: 900 volts
CONSTRUCTION: Black ABS plastic with stainless steel protective screen
SUGGESTED INSTRUMENTS: General purpose survey meters, ratemeters, and scalers
SIZE: 3.5" H x 4.5" W x 7.8" L (8.9 x 11.4 x 19.8 cm)
WEIGHT: 2 lb (0.9 kg)