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Gamma GM

All our instruments and detectors come standard with series "C" connectors. However, other connectors are available if specifically requested when ordering your instrument. View a list of common connectors.

Detector Reference Chart

Product	Detector Type	Sensitivity (Cs-137)	Linear Range (w/o DTC)

Model 133 Series	Energy-Compensated GM	133-2: 1000 cpm per mR/hr 133-3: 450 cpm per mR/hr 133-4: 100 cpm per mR/hr 133-6: 18 cpm per mR/hr 133-7: 4.2 cpm per mR/hr	133-2: 0.1 to 200 mR/hr 133-3: 0.1 mR/hr to 1 R/hr 133-4: 1 mR/hr to 2 R/hr 133-6: 4 mR/hr to 6 R/hr 133-7: 25 mR/hr to 30 R/hr
Model 44-6	GM with Beta Window	1200 cpm per mR/hr	±10% up to 50 mR/hr
Model 44-38	GM with Beta Window	1200 cpm per mR/hr	±10% up to 50 mR/hr
Model 44-150 Series	Energy-Compensated GM	44-150-1: 4000 cpm per mR/hr 44-150-3: 13,500 cpm per mR/hr	44-150-1: 0.1 to 50 mR/hr 44-150-3: 0.01 to 8 mR/hr
Model 44-183	Energy-Compensated GM with Lead Shielding	100 cpm per mR/hr	1 mR/hr to 2 R/hr