Hertz electron tube for quantitative investigations of inelastic collisions of electrons with inert gas atoms, determination of ionization energies of helium, as well as resolution of the energy states of various primary and orbital angular-momentum quantum numbers. Includes shielding and battery unit for the collector voltage (battery not  included).

• Cathode filament voltage: U_F ≤ 7 V
• Anode voltage: U_A ≤ 60 V
• Anode current: I_A ≤ 10 mA
• Collector voltage: U_c = 1.5 V
• Collector current: I_c ≤ 200 pA