GNP358-4R Specifications

Geiger-Mueller Tube
Platinum Plated High Sensitivity
High Temperature Radiation Counter Tube

Electrical Characteristics

Recommended Operating Voltage (volts)900
Operating Voltage Range (volts)850 - 1050
Maximum Dead Time (μs)180
Maximum Plateau Slope (%/100 volts)8
Minimum Anode Resistor (MΩ)3.3
Recommended Anode Resistor (MΩ)5
Gamma Sensitivity Cs137 (cps/mR/hr)75
Max. Background Shielded 50mmPb+3mmAl (cpm)65
Tube Capacitance (pF)11

Mechanical Characteristics

Nominal Active Length (inch/mm)3.96 / 100.6
Window Thickness (mg/cm2)-
Active Diameter (inch/mm)0.61 / 15.5
Cathode MaterialCr - Fe
Cathode Wall Thickness (inch/mm)0.010 / 0.25
Operating Temperature Range (°C)-55 to 200
Fill GasNe/Ar + Halogen
Type of ConnectorCannon
Approx. Weight (grams)33
Maximum Altitude (ft)TBD

Equivalent models: NP358-4R

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