Model 44-9 Alpha, Beta and Gamma Detector
Ludlum Measurements, Inc. Page 3 December 2016
Window Area: active is 15.51 cm
2
; open is 12.26 cm
2
Detector: pancake-type halogen quenched GM
Detector Operating Voltage: 900 Vdc
Compatible Instruments: general purpose survey meters,
ratemeters, and scalers.
Connector: series ˝C˝ (others available)
Construction: aluminum housing with beige powder-coat
finish; stainless steel protective screen (79% open)
Temperature Range: -15 to 50 °C (5 to 122 °F); may be
certified for -40 to 65 °C (-40 to 150 °F)
Size: 4.6 x 6.9 x 27.2 cm (1.8 x 2.7 x 10.7 in.) (H x W x L)
Weight: 0.5 kg (1 lb)
Operating Procedures
CONNECTING TO AN INSTRUMENT
Connect one end of the cable provided to the
detector by firmly pushing the connector
together while twisting clockwise a quarter of a
turn until latched. Repeat the process in the
same manner with the other end of the cable
and the instrument.
TESTING THE DETECTOR
1. Ensure that the instrument high voltage (HV) is at the
proper setting for the detector (900 volts)
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