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Model 44-38

Beta-Gamma Detector

Part Number: 47-1588

Specifications

Indicated Use	Beta-gamma survey
Detector Type	50 mg/cm² stainless steel wall halogen quenched GM
Detection Range	*Without DTC: 0.5 to 500 µSv/h (0.05 to 50 mR/hr) With DTC:* 0.5 µSv/h to 5 mSv/h (0.05 to 500 mR/hr) With SCC:** 0.5 µSv/h to 20 mSv/h (0.05 mR/hr to 2 R/hr)
Typical Sensitivity (¹³⁷Cs gamma)	120 cpm per µSv/h (1200 cpm per mR/hr) with window closed
Energy Response	Within 20% of ¹³⁷Cs (662 keV) from 60 keV to 1.3 MeV
Beta Cut Off	Approximately 200 keV (window open)
Typical Background (10 µR/hr field)	Closed: 20 cpm Open: 25 cpm
Typical Dead Time	95 µs
Operating Voltage	900 V
Connector	Series "C"
Body Construction	Anodized aluminum housing with rotary beta window
Window Construction	Tin shields mounted on aluminum with a solid aluminum gap in the middle Low-Energy Blocking Window: outside of slots, total density thickness is 1368 mg/cm², including tube wall Low-Energy Pass-Through Window: through slots, total density thickness is 667 mg/cm², including tube wall
Size (D x L)	3.3 x 16.5 cm (1.3 x 6.5 in)
Weight	0.5 kg (1 lb)

*DTC: Dead Time Correction, available on some instruments
**SCC: Series Correction Constant, available on some instruments

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