Environmental Restoration Group

Ludlum Model 43-5
Ludlum Product Description

Specifications
INDICATED USE: Alpha survey
SCINTILLATOR: ZnS(Ag)
WINDOW: Typically 0.8 mg/cm2 aluminized mylar (1.2 mg/cm2 recommended for outdoor use)
BACKGROUND: 3 cpm or less
NON-UNIFORMITY: Less than 10%
SUGGESTED INSTRUMENTS: General purpose survey meters, ratemeters, and scalers
OPERATING VOLTAGE: Typically 500 - 1200 volts
WINDOW AREA: 76 cm2 active, 50 cm2 and open
PHOTOMULTIPLIER TUBE: 1.5"(3.8 cm) diameter
EFFICIENCY (4pi): 13%-239Pu
SIZE: 2" H x 2.5" W x 9.8" L  (10.2 x 6.4 x 35.6 cm)
WEIGHT: 2 lbs (0.9 kg)
8809 Washington St. NE Suite 150
Albuquerque, NM 87113
Tel: (505) 298-4224
Fax: (505) 797-1404