Indicated Use	Low-energy gamma survey
Detector Type	CsI crystal scintillator, 12.7 cm (5 in.) dia. x 1.2 mm (0.050 in.) thick
Window	10.6 mg/cm² metallized polyester
Window Area	Active: 127 cm²(10.6 in²) Open: 127 cm² (10.6 in²)
Efficiency (4π)	²⁴¹Am: 13% U (natural): 8%
Typical Sensitivity (¹²⁵I)	675 cpm per µR/hr
Data Range	0 to 1,500,000 cpm
Typical Background (10 µR/hr field)	≤ 9000 cpm (gross counting)
Recommended Energy Range	10 to 200 keV
Energy Response	Energy dependent
Photomultiplier Tube	12.7 cm (5.0 in.) diameter
Temperature Range	-15 To 50 °C (5 to 122 °F) May be certified to operate from -40 to 65 °C (-40 to 150 °F)
Connector	Series "C" (others available)
Construction	Aluminum housing
Size (D x L)	15.2 x 23.6 cm (6 x 9.3 in.)
Weight	3.2 kg (7 lb)

Option	Description	Part Number
Tripod Assembly	Includes attachment plate and tripod stand.	4574-099
Horizontal Handle	A fixed handle to facilitate handling the detector.	4574-097
Vertical Handle	An adjustable and ergonomic handle allows the user to easily scan while keeping the detector up to 30.5 cm (12 in.) above the floor or ground.	4574-066