Experiment plate for the assembly of a vacuum chamber in conjunction with the Vacuum Bell Jar (U218511) for exploration of physical phenomena in vacuum. The metal plate has a sealing ring, is mounted on a tripod, has a hose connection on the pump-side, and a ventilation port. Includes two-pole current feed via 4-mm safety sockets, a cable of approximately 1 m length with 4-mm safety plugs, plus a central bore with M12 thread for attaching experimental equipment.