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Bell Jar with Bell and Pressure Plate - Image One
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Lab Supplies > Physics Lab Gear

Bell Jar with Bell and Pressure Plate

Item#: 14813   4.5 star rating 2 customer reviews
List Price:$119.99
SALE PRICE: $98.95 /each
You Save: $21.04 (17%)
IN STOCK Ships in 1-2 work days
from our Lakewood, CA warehouse.
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Sound waves will not travel through a vacuum. Prove it with this demonstration of a ringing bell inside a sealed glass jar. As air is gradually vacuumed out of the jar, the bell will become faint, and will eventually become silent. Great demonstration model for the classroom setting.


  • Bell jar with bell and pressure plate
  • Demonstrates the inability of sound waves to travel through a vacuum
  • Excellent classroom demonstration model
  • Size: 8 inches diameter base, 8 inch tall glass dome
  • Requires standard 1/4 inch tubing

14 +
Approx. Ship Size:
12.00 x 10.25 x 9.00 inches
30.48cm x 26.04cm x 22.86cm
3 lb 6 oz
1.52 kg

Prop 65 Warning SignWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.

Customer Reviews

4 star rating  It's good but be careful
Buyer from New Haven, CT
After using the Bell Jar with Bell and Pressure Plate for the first time, I unfortunately encountered an issue where the bell broke and the wires got dislocated. I'm honestly unsure how this happened, but it was disappointing to see the product's durability compromised so easily. Fortunately, I was fortunate to have a friend who is skilled at soldering and was able to repair it for me. It's worth noting that while the bell jar itself is cool and intriguing, it's important to handle it with care to avoid damaging the delicate wires. Despite the initial setback, I appreciated the unique experience the product provided, but it would greatly benefit from improved durability and sturdier construction to avoid similar issues in the future.

5 star rating   Corwin Witt from Oak Ridge, TN
We boiled water, inflated a balloon, and could not heard the bell ringing under the vacuum with this bell jar.

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