Vacuum Bell Jar, Vaccum Demonstration Kit, Vacuuming Demonstration Hood Teaching Tools, So...
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- 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.