Vacuum Bell Jar, Classroom Laboratory Vacuum Bell Jar Vacuuming Demonstration Hood Teaching Tools, Vacuum Chambers

Spec:Item Type: Vacuum Bell JarMaterial: PVCBattery: 2 x AA battery, shipped without batteries. packing list:1 xVacuum Bell Jar1 x Bell1 x Vacuuming Plate

• Vacuum Sound Jar: Place the electric bell in the jar and you can hear a crisp ringing sound. Then pull out the air and the bell will gradually weaken until no sound is heard. Close the exhaust valve for students to observe. The bell continued to ring, but no sound could be heard.
• Simple Operation: The operation of the sound physics demonstration is very simple, so students can have better and happier learning in class.
• More Experiments: A cup of boiling hot water has been discharged into the bell jar and pumped, and you can see that the hot water in the cup is boiling again. In addition, this instrument can also be used for experiments such as vacuum fountains, evaporative icing, vacuum coating, atmospheric pressure, etc.
• Made Of Good PVC: Made of PVC material, the transparent hood can clearly display the electric bell inside, making it very easy to inspect.
• Convenient Carry: Comes with a light weight and a compact size as well, the whole vacuum bell jar set is very convenient to carry to outdoor.