Vacuum Bell Jar, Vaccum Demonstration Kit, Vacuuming Demonstration Hood Teaching Tools, Sound Physics Demonstration, with Base, for Classroom Laboratory

About this item

VACUUM SOUND TANK: Place an electric bell in the tank and a clear ringing sound can be heard, then pump out the air and the ringing will diminish until no sound can be heard. Close the vent valve and have the students observe. The bell is still ringing, but no sound can be heard. | VARIOUS VACUUM TESTS: A cup of boiling hot water is discharged into the bell, then the air is pumped out and the cup can be seen boiling again. In addition, the instrument can also be used for vacuum fountain, evaporation icing, vacuum coating, atmospheric pressure and other experiments. | EASY OPERATION: The operation of the sound physics demonstrator is very simple, so students can learn better and happier in the classroom. It is a good piece for educational demonstration, laboratory experiment teaching, gift demonstration, desktop decoration and so on. | PVC MATERIAL: Glass Vacuum Bell Jar is made of PVC material, the transparent cover can clearly show the bell inside, very easy to check. Physics experiment demonstration tool or as a lab decoration, make physics learning more efficient. | EASY TO CARRY: The whole set of vacuum electric bell jar is light in weight and small in size, very easy to carry outdoors. If you have any questions, please contact us through Amazon, we will help you to solve the problem.

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