GN1200 Specifications

Geiger-Mueller Tube
Halogen Quenched, γ Radiation 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)N/A
Active Diameter (inch/mm)0.570 / 14.48
Cathode MaterialCr - Fe
Cathode Wall Thickness (inch/mm)0.012 / 0.3
Operating Temperature Range (°C)-40 to 75
Fill GasNe/Ar + Halogen
Type of ConnectorAnode Pin
Approx. Weight (grams)6
Maximum Altitude (ft)N/A

Equivalent models: ZP1200 , N305 , 7121

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