Energy Compensated GM. The Standard probe for transportation surveys.
APPLICATION: beta gamma radiation survey
RADIATION 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/mR/hr (137Cs gamma) with window closed
BACKGROUND: 20 cpm closed; 25 cpm open
ENERGY RESPONSE: ±15% of true value from 50 keV-1.25 MeV
BETA CUT OFF: approximately 200 keV (window open)
DEAD TIME: typically 95 microseconds
OPERATING VOLTAGE: 900 volts
COMPATIBLE INSTRUMENTS: general purpose radiation survey meters, ratemeters and scalers
CONNECTOR: series "C"
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)
SIZE: 1.3 x 6.5 in. (3.3 cm x 16.5 cm) (Dia x L)
WEIGHT: 1 lb (0.5 kg)