An efficient design for all the usual electrostatic experiments and for where a continuous source of high voltage is required. It has a strong metal base with profiled hand grips, housing a quiet running a.c. motor. The discharge sphere may be plugged into the base or supported separately, linked to the arching post with a standard 4mm connecting lead. Charge Collecting Belt: silicone rubber having excellent insulation resistance. Tracking: belt-tracking easily adjusted. Charge Collecting Combs: aluminium mesh, design to be clearly visible. Spheres: aluminium, 230mm diameter. Connections: 4mm sockets in dome and base. Voltage Developed: up to 200kV, depending on ambient conditions, with a spark length of 60mm. Discharger: spherical 75mm diameter on rod for plugging into the base earth socket or support in a retort stand. Supplied with 1.5m mains lead, illuminated mains on/off switch and fuse. This device is compliant to EN61010-2010 with certificates available on request. Dimensions: 225mm x 180mm x 480mm. Spares available:. White Plastic Discharge Sphere Holders: B8R08205 - Pack of 10. Plastic Sphere Holder Connector: B8R08207 - Pack of 10. Charge Collecting Belt: B8H26769. O-Ring Seal: B8R08206 - Pack of 10.