Bell Jar and Ringer Manufacturer,Supplier and Exporter in India

Bell Jar and Ringer

Product Code : ILS-SAR-11743

Indian Lab Suppliers supplies the Bell Jar and Ringer (Product ID: 11743) as part of its sound and resonance range. A bell jar with a battery-operated bell inside, used with a vacuum pump to show that sound needs a medium.

Quick Answer

The bell is mounted on springs to cut down vibration passing through the base, so when the air is pumped out of the jar students hear a sharp drop in loudness. The jar is 8.5 inches in diameter and 11.5 inches tall, and the ringer needs 2 AA batteries. An electric vacuum pump is not included.

Key Specifications

ParameterDetail
Jar size8.5 in diameter × 11.5 in tall
Bell mountingOn springs
PowerNeeds 2 × AA batteries
Not includedElectric vacuum pump

Where This Is Used

Used in secondary physics to show that sound cannot travel through a vacuum. A simpler, modern version is the Piezo Buzzer in Vacuum Chamber (Product ID: 11739). Handle the evacuated jar with care and let air back in slowly. Browse the full Sound and Resonance range or related Wave Motion products.

Frequently Asked Questions

Why is the bell on springs?
To stop vibration reaching the base, so the drop in sound is clear.

Is a vacuum pump included?
No, an electric vacuum pump is needed separately.

What batteries does it need?
2 AA batteries.

Related Categories

Sound and Resonance · Wave Motion · Physics Lab Equipment

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Office Address

Works: #975 Malleshwaram,
Bengaluru, Karnataka 560003

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