Indicated Use	Beta detection
Detector Type	Plastic scintillator, 4.3 cm (1.7 in) dia. x 0.03 cm (0.01 in) thick
Window	1.2 mg/cm²
Window Area	Active: 9.7 cm² (1.5 in²) Open: 9.7 cm² (1.5 in²)
Efficiency (4π)	¹⁴C: 7%
Typical Background (10 µR/hr field)	100 cpm
Detector Uniformity	within 10% of average reading
Photomultiplier Tube	3.8 cm (1.5 in) diameter
Operating Voltage	500 to 1200 V (typical)
Connector	Series "C" (others available)
Construction	Aluminum housing with beige powder coat
Size (D x L)	5.1 x 18.5 cm (2 x 7.3 in)
Weight	0.3 kg (0.6 lb)

Option	Description	Part Number
Model 180-1	Sample holder for 5.1 cm (2 in.) max. diameter samples.	47-1675
Model 180-1L	Sample holder with lead shielding for 5.1 cm (2 in.) max. diameter samples.	47-2988
Model 180-24	Sample holder for 5.1 cm (2 in.) max. diameter samples.	47-2631
Detector Collimators	Lead collimators.	Various
Sample Planchets	Set of 500 aluminum or stainless steel sample planchets.	Depends on material

Description	Part Number
Window Assembly	40-4375
Scintillator	01-5150
1.5 in. PMT, Non-Based with Voltage Divider	4002-510
Red Protective Cap	03-5475