Eisco Labs: Bell Jar with Battery Operated Buzzer

$125.29
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SKU: 261392
  • Alarm Bell
  • Battery Buzzer
  • Notification Bell
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Details

Without air or matter, sound waves cannot travel and therefore cannot be heard. This bell jar effectively demonstrates this concept using a battery–operated buzzer housed inside an acrylic tube. When the buzzer is placed beneath the jar and a vacuum seal is created in the chamber, students will observe a total absence of sound. Once air is returned to the chamber, the sound of the buzzer can be heard once more. Activity requires a vacuum pump, not included. Height 14 cm dia. 10 cm.

  • Constructed of thick acrylic plastic with removable bottom
  • Top and bottom o rings ensure leak less fit
  • Valve on top to crease easy connection for vacuum pump
  • Internal buzzer with flip switch, kit includes battery
  • Recommended any basic hand vacuum m pump

Specifications

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