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GN201 Specifications

Thin Wall Geiger-Mueller Tube
End Window Halogen Quenched α,β,γ Radiation Tube

Electrical Characteristics

Recommended Operating Voltage (volts)750
Operating Voltage Range (volts)650-900
Maximum Dead Time (μs)100
Maximum Plateau Slope (%/100 volts)5
Minimum Anode Resistor (MΩ)1
Recommended Anode Resistor (MΩ)3.3
Gamma Sensitivity Cs137 (cps/mR/hr)45
Max. Background Shielded 50mmPb+3mmAl (cpm)25
Tube Capacitance (pF)8

Mechanical Characteristics

Nominal Active Length (inch/mm)4.00 / 101.6
Window Thickness (mg/cm2)1.8 - 2.2 , Mica
Active Diameter (inch/mm)0.78 / 20.0
Cathode MaterialCf , Fe
Cathode Wall Thickness (inch/mm)-
Operating Temperature Range (°C)-20 to 50
Fill GasNe + Halogen
Type of ConnectorPin
Approx. Weight (grams)-
Maximum Altitude (ft)8000

Equivalent models: N201

Global Nucleonics has the design and engineering capability to produce detectors to your specifications.

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