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GN1321 Specifications

Energy Compensated Geiger-Mueller Tube
Halogen Quenched, γ Radiation Tube.

Electrical Characteristics

Recommended Operating Voltage (volts)575
Operating Voltage Range (volts)500 - 650
Maximum Dead Time (μs)45
Maximum Plateau Slope (%/100 volts)8
Minimum Anode Resistor (MΩ)2.2
Recommended Anode Resistor (MΩ)4.7
Gamma Sensitivity Cs137 (cps/mR/hr)8
Max. Background Shielded 50mmPb+3mmAl (cpm)12
Tube Capacitance (pF)1

Mechanical Characteristics

Nominal Active Length (inch/mm)1.08 / 27.4
Window Thickness (mg/cm2)N/A
Active Diameter (inch/mm)0.31 / 7.9
Cathode MaterialCr - Fe
Cathode Wall Thickness (inch/mm)0.002 / 0.05
Operating Temperature Range (°C)-40 to 70
Fill GasNe/Ar + Halogen
Type of ConnectorAnode Pin
Approx. Weight (grams)20
Maximum Altitude (ft)TBD

Equivalent models: ZP1321 , 71322 , N117-1S

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

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