Original model for the study of vacuum - 3 different ways of revealing vacuum
This original model allows you to reveal the vacuum inside a vacuum bell in 3 different ways: sound, air movement, pressure difference.

consists of a plexiglass stand on which 3 devices are arranged to reveal the vacuum:

• 1 buzzer for revealing vacuum by sound;
  
• 1 motor with propeller placed in front of a mast on which are hung light strips agitating when there is air displacement.
  
• 1 cylinder allowing you to perform the bladder bursting experiment for example.
  
  Dimensions: 100 x 100 x 108 mm
  Power supply: battery (not included)
  On /off switch