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GN1401 Specifications

Mica Window Halogen-Quenched
α,β,γ Geiger-Mueller Tube

Electrical Characteristics

Recommended Operating Voltage (volts)500
Operating Voltage Range (volts)400 - 600
Maximum Dead Time (μs)90
Maximum Plateau Slope (%/100 volts)4
Minimum Anode Resistor (MΩ)10
Recommended Anode Resistor (MΩ)10
Gamma Sensitivity Cs137 (cps/mR/hr)23
Max. Background Shielded 50mmPb+3mmAl (cpm)10
Tube Capacitance (pF)3

Mechanical Characteristics

Nominal Active Length (inch/mm)1.20 / 30.5
Window Thickness (mg/cm2)1.5 - 2.0 , Mica
Window Diameter (inch/mm)0.45 / 11.4
Active Diameter (inch/mm)0.57 / 14.5
Cathode MaterialCr - Fe
Cathode Wall Thickness (inch/mm)0.012 / 0.30
Operating Temperature Range (°C)-20 to 55
Fill GasNe/ Ar + Halogen
Type of ConnectorAnode Pin
Approx. Weight (grams)6
Maximum Altitude (ft)10,000

Equivalent models: N205 , ZP1401

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

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