This is a halogen quenched metal tube with a thin end window, is used for detecting alpha, beta and gamma radiation and is recommended as a general purpose tube for use with the radioactive sources. A removable protective mesh cap of plastic is fitted over the window and the body has a thin plastic coating. Features: Sensitive to alpha, beta and gamma radiation. Threshold voltage: max. 400V. Plateau length: min. 100V. Recommended supply voltage: 450V. Operating temperature: -40 to +75°C. Dead time (at 450V): 120µs. Anode/cathode capacity: 3.5pF. Sensitivity for 1mR/L radium: 1650 counts min-1. Window thickness: 2.5 - 3.0 mg cm-2. Dimensions overall: 76mm x 26mm diameter. Life expectancy at approx. 25°C: 5x10¹° counts. This Geiger-Muller tube must be used with the Geiger-Muller Tube Holder which is sold separately (B8H27155).
