Alpha Beta Gamma Detector - Model 44-40-2
CE Seal
Specifications

INDICATED USE: alpha, beta, gamma survey; sample counting
DETECTOR: pancake-type, halogen quenched GM
WINDOW THICKNESS: 1.7 ± 0.3 mg/cm² mica
WINDOW AREA: 15.51 cm² (2.4 in²) active, 12.26 cm² (1.9 in²) open
PROTECTIVE SCREEN: stainless steel, 79% open
EFFICIENCY (4π) (approximate): 5% for 14C; 22% for 90Sr/90Y; 19% for 99Tc; 32% for 32P; 15% for 239Pu
SENSITIVITY (137Cs gamma): typically 3300 cpm/mR/hr
BACKGROUND: 25 cpm
GAMMA FRONT TO BACK RATIO: 4 to 1
LEAD SHIELD THICKNESS: 1.3 cm (0.50 in.) on side; 3.6 cm (1.4 in.) on back
ENERGY RESPONSE: energy dependent
OPERATING VOLTAGE: 850 to 1000 V (nominally 900 volts)
CONNECTOR: series "C" (other available)
CONSTRUCTION: painted aluminum housing over lead shielding, stainless steel screen
SIZE: 13.7 x 11.4 cm (5.4 x 4.5 in.) (H x W)
WEIGHT: 2.5 kg (5.4 lb)