This is an integral system with the pump plate & hand vacuum pump. The plate comes with a rubber seal which facilitates sealing in bell jar experiments. The plate can be used with electric vacuum pumps also. A rubber seal is provided for copper pump plate.
A new improved Acrylic Bell Jar of size 25 x 14 cm compatible with the pump plate. The bottom flange is ground flat to ensure a perfect seal. Electric bell is mounted for sound in vacuum experiments. The Electric bell oerates on 4-6V AC/DC.