This sensitive GM tube is ideal for detecting , andradiation and is recommended as a general purpose tube. The GM tube must be used with the GM Tube Holder (see below).
A removable protective mesh cap of plastic is fitted over the window and the body has a thin plastic coating.
• Sensitive to ,andradiation. • Threshold voltage (max.) 370V
• Plateau length (min.) 100V • Operating temperature -55 to +75°C • Dead time 100µs • Anode/Cathode capacity 3.5pF • Sensitivity for 1mR/L radium 1650 counts min-1 • Window thickness 2.5 mg cm-2
• Halogen quenched metal tube with thin end window
• Dimensions overall 76 x 26mm diameter E8A49724
B. Geiger-Muller Tube Holder
A cylindrical metal body 63 x 35mm diameter x depth which houses the tube socket and is mounted on a sheet metal stand with resilient rubber-strip feet. A captive co-axial connecting lead 1m long is provided, terminating in a standard BNC connector. A 2.2 M protective stabilising resistor is internally wired in series with the anode connection.