Quick Answer: The Vacuum Bell with Plate is a transparent bell jar on a base plate with a sealing surface and vacuum outlet, for vacuum and air pressure demonstrations. Connected to a vacuum pump, the air inside is drawn out while students watch the experiment through the jar.
Last updated: October 2026
Key Features
Transparent bell jar for a clear view of the experiment
Base plate with a smooth sealing surface
Vacuum outlet for connection to a pump with rubber vacuum tubing
Experiment objects are placed on the plate under the jar
Technical Specifications
Specification
Value
Bell jar
Transparent
Base plate
With sealing surface
Connection
Vacuum outlet for rubber vacuum tubing
Use with
Suitable vacuum pump (required)
About This Product
With an object on the plate and the jar seated evenly, a little vacuum grease or a sealing ring helps make the joint airtight before pumping starts. The set is used to show that sound does not travel through a vacuum, that water boils at reduced pressure and that trapped gases expand. The vacuum is released slowly before the jar is lifted.
Frequently Asked Questions
Does the Vacuum Bell with Plate need a vacuum pump?
Yes. A suitable vacuum pump, connected to the outlet with rubber vacuum tubing, is needed to remove the air from inside the bell jar.
