Beta Gamma Detector - Model 44-38
CE Seal
Specifications

INDICATED USE: beta, gamma survey
SUGGESTED INSTRUMENTS: general purpose survey meters, ratemeters, and scalers
DETECTOR: 30-45 mg/cm² stainless steel wall halogen quenched GM
DETECTION RANGE: ±10% up to 50 mR/hr without DTC and up to 500 mR/hr with DTC
SENSITIVITY: 1200 cpm per mR/hr (137Cs gamma) with window closed
BACKGROUND: 20 cpm closed; 25 cpm open
GAMMA ENERGY RESPONSE (window closed): response within 20% of 137Cs (662 keV) from 60 keV to 1.3 MeV
BETA CUT OFF: approximately 200 keV (window open)
DEAD TIME: typically 95 microseconds
OPERATING VOLTAGE: 900 volts
CONSTRUCTION: anodized aluminum housing
WINDOW CONSTRUCTION:
Low Energy Blocking Shield:  tin shields mounted on aluminum (1353 mg/cm²) with solid aluminum gap in the middle
        Low Energy Pass Through Window: solid aluminum (610 mg/cm²)
CONNECTOR: series "C"
SIZE: 3.3 cm x 16.5 cm (1.3 x 6.5 in.) (Dia x L)
WEIGHT: 0.5 kg (1 lb)