Specially designed for electrostatic experiments and where continuous source of high voltage is required. Fitted on base with smooth running DC Motor, operates on 220 or 110 volts A.C. 50 Hz. (Includes 2 prong European plug). Charge collecting Belt : Silicon rubber having excellent insulation resistance. Tracking : Belt-tracking easily adjusted. Charge collecting combs : Aluminium mesh, clearly visible. Spheres : Aluminium 150 mm. dia. Connections : 4 mm. sockets in dome and base. Voltage developed : Upto 200 kV, depending on ambient conditions & humidity, with a spark length of 60 mm. Discharger : Spherical 100 mm. dia., with insulated handle and 4 mm sockets.