Alpha Detector - Model 43-2
CE Seal
Specifications

INDICATED USE: alpha survey
SUGGESTED INSTRUMENTS: general purpose survey meters, ratemeters, and scalers
CONNECTOR:  series "C" (others available)
SCINTILLATOR: ZnS(Ag)
EFFICIENCY (4π): 30% for 239Pu; 30% for 230Th
WINDOW: typically 0.8 mg/cm² aluminized polyester (1.2 mg/cm² recommended for outdoor use)
WINDOW AREA: 9.7 cm² (1.5 in²) active and open
BACKGROUND: 3 cpm or less
NON-UNIFORMITY: less than 10%
TUBE: 3.8 cm (1.5 in.) diameter magnetically shielded photomultiplier
OPERATING VOLTAGE: typically 500 to 1200 volts
CONSTRUCTION: aluminum with beige powder coat
TEMPERATURE RANGE: -20 to 50 °C (-4 to 122 °F)
SIZE: 4.8 x 18.4 cm (1.9 x 7.3 in.) (Dia x L)
WEIGHT: 0.3 kg (0.6 lb)