Ludlum Model 44-9 Pancake G-M

The Model 44-9 is a pancake G-M that can be used with several different instruments including survey meters, scalers, ratemeters, and alarm ratemeters.


Indicated Use: Alpha beta gamma survey; Frisking 
Window: 1.7 plus or minus 0.3 mg/cm² mica
Detector: Pancake type halogen quenched G-M
Window Area: Active - 15 cm²
                     Open - 12 cm²
(4pi geometry): Typically 5%-C-14; 22%-Sr-90/Y-90; 19%-Tc-99; 32%-P-32; 15%-Pu-239
Sensitivity: Typically 3300 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: Aluminum housing with beige polyurethane enamel paint
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: 1.8" (4.6 cm)H X 2.7" (6.9 cm)W X 10.7" (27.2 cm)L
Weight: 1 lb (0.5kg) 

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Energy Response Characteristics