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GM35 End-Window GM Detector

The GM35, end-window, Geiger-Mueller detector will detect alpha, beta, and gamma, and x-ray radiation (or combinations thereof).

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The GM35, end-window, Geiger-Mueller detector will detect alpha, beta, and gamma, and x-ray radiation (or combinations thereof). The thin mica window is protected by a thin steel screen that can be removed. The GM35 detector operates at the manufacturer recommended 900 V.

Cable not included.

Maximium Starting Voltage 850 volts
Recommended Operating Voltage 900 volts
Operating Voltage 850-1000 volts
Maximum Dead Time 150 µs
Maximum Plateau Slope 10% / 100 volts
Minimum Anode Resistor 1 MΩ
Recommended Anode Resistor 3.3 MΩ
Gamma Sensitivity Cs-137 40 cps per mR/hr
Tube Capacitance 5 pF
Nominal Active Length 2.25 inches (57.2 mm)
Window Material Mica
Window Thickness 1.8 to 2.2 mg/cm2
Active Diameter 1.13 inches (28.7 mm)
Cathode Material Cr – Fe
Cathode Wall Thickness 0.06 inches (1.52 mm)
Operating Temperature Range -20 to 50°C
Fill Gas Ne/Ar + Halogen
Type of Connector BNC
Approximate Weight 150 grams
Maximum Altitude 8000 ft

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