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Bell Jar With Stopper
High-Vacuum Integrity: Features a heavy-duty, fire-polished top opening compatible with standard interchangeable stoppers, ensuring a hermetic seal for experiments involving reduced atmospheric pressure.
Precision-Ground Base Flange: The wide, broad flange is meticulously ground to a flat finish, allowing for a vacuum-tight interface when used with glass plates or specialized silicone vacuum grease.
₹500.00
Quick answer: A Bell Jar With Stopper is a glass vacuum chamber with a precision-ground flange for an airtight seal, used in physics and chemistry demonstrations involving atmospheric pressure and vacuum. Bell Jar With Stopper is priced at approximately ₹500 (indicative market benchmark, incl. GST, August 2026).
A bell jar is a large, dome-shaped glass vessel that sits on a flat base plate, with a precision-ground flange forming an airtight seal when placed over the base. Connected to a vacuum pump, it creates an enclosed low-pressure environment used to demonstrate the effects of vacuum and atmospheric pressure — such as the expansion of a balloon under reduced pressure, or the behavior of sound in a partial vacuum. It’s a standard piece of demonstration apparatus in college and school physics and chemistry laboratories.
Technical Specifications
| Parameter | Detail |
|---|---|
| Product Type | Bell jar with stopper |
| Function | Vacuum chamber for atmospheric pressure and vacuum demonstrations |
| Sealing | Precision-ground glass flange for airtight fit |
| Exact dimensions/capacity | Not independently verified for this listing — confirm with STEMAids before ordering |
| Vacuum rating | Manufacturer-stated — verify before publishing |
| Price | Approx. ₹500 (indicative market benchmark, incl. GST, August 2026) |
| Exact dimensions/technical detail | Not independently verified for this listing — confirm with STEMAids before specifying in a tender |
Applications
- Atmospheric pressure and vacuum demonstrations
- Physics experiments involving reduced-pressure environments
- Chemistry demonstrations of vacuum-sensitive behavior
- College and school laboratory teaching apparatus
Care & Maintenance
- Handle the glass dome carefully — avoid dropping or knocking against hard surfaces
- Check the ground-glass flange for chips that could compromise the vacuum seal
- Grease the flange lightly as needed to maintain an airtight fit
Why Choose STEMAids
STEMAids supplies a wide range of Chemistry Lab Equipments including Aspirator for related laboratory and classroom needs. Eduscope Smart Learning Solutions Private Limited is a Udyam-registered micro manufacturing enterprise (UDYAM-DL-06-0069460) and ISO 9001:2015 certified, supplying schools, colleges and vocational institutes across India and for export.
Frequently Asked Questions
What is a bell jar used for?
It’s used to create a sealed, low-pressure vacuum environment for demonstrating atmospheric pressure and vacuum effects in physics and chemistry teaching.
Does this come with a vacuum pump?
This listing is for the bell jar and stopper/base only; contact STEMAids to confirm compatible vacuum pump options.
What size bell jar does STEMAids offer?
Exact dimensions and capacity have not been independently verified for this listing — confirm with STEMAids before ordering.
Is this suitable for a school or college physics lab?
Yes — bell jars are standard demonstration apparatus for atmospheric pressure and vacuum teaching in physics and chemistry coursework.
Does STEMAids supply matching base plates?
Contact STEMAids to confirm compatible base plates for a complete setup.
Is STEMAids a registered manufacturer of this product?
Yes. Eduscope Smart Learning Solutions Private Limited is a Udyam-registered micro manufacturing enterprise (UDYAM-DL-06-0069460) and is ISO 9001:2015 certified. See the About page for full registration and certification details — manufacturer-stated, verify before citing in procurement documents.
Last updated: 29 August 2026.
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