GNP358-1.8 Specifications

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

Electrical Characteristics

Recommended Operating Voltage (volts)700
Operating Voltage Range (volts)650 - 800
Maximum Dead Time (μs)100
Maximum Plateau Slope (%/100 volts)6
Minimum Anode Resistor (MΩ)2.0
Recommended Anode Resistor (MΩ)5.0
Gamma Sensitivity Cs137 (cps/mR/hr)27
Max. Background Shielded 50mmPb+3mmAl (cpm)30
Tube Capacitance (pF)50

Mechanical Characteristics

Nominal Active Length (inch/mm)1.80 / 45.7
Window Thickness (mg/cm2)-
Active Diameter (inch/mm)0.605 / 15.4
Cathode Material446 St. Stl.
Cathode Wall Thickness (inch/mm)0.020 / 0.5
Operating Temperature Range (°C)-40 to 175
Fill GasNe/Ar + Halogen
Type of ConnectorFlying Lead
Approx. Weight (grams)TBD
Maximum Altitude (ft)TBD

Equivalent models: NP358-1.8

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