Ludlum Model 44-89 Square Cluster Pancake G-M

The Model 44-89 is a 4 pancake square cluster G-M detector for contamination survey. 

radprobe-ludlum44-89Indicated Use: Alpha beta gamma survey 

Detector: 4 ea. pancake type halogen quenched G-M
Window: 1.7 plus or minus 0.3 mg/cm² mica
Window Area: Active - 63 cm²
                     Open - 50 cm²
Efficiency (4pi geometry): Typically 5%-C-14; 23%-Sr-90/Y-90; 19%-Tc-99; 33%-P-32; 15%-Pu-239
Sensitivity: Typically 12,000 cpm/mR/hr (Cs-137 gamma )
Energy Response: Energy dependent
Dead Time: Typically 80 microseconds
Compatible Instruments: General purpose survey meters, ratemeters, and scalers
Operating Voltage: 900 volts
Connector: Series "C" (others available )
Construction: Black ABS plastic with anodized aluminum back and stainless steel protective screen (79% open )
Temperature Range: -4° F(-20° C) to 122° F(50° C) 
May be certified for operation from -40° F(-40° C) to 150° F(65° C)
Size: 3.3" (8.4 cm)H X 5" (12.7 cm)W X 6.9" (17.5 cm)L
Weight: 1.9 lbs (0.8kg) 

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