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Microbial Fermentation Testing Tube
Original price was: ₹150.00.₹65.00Current price is: ₹65.00.
Quick answer: A microbial fermentation testing tube is used in microbiology to detect gas production during bacterial fermentation of a sugar or other substrate, most often as part of a Durham tube style setup.
In this classic microbiology technique, a small tube is inverted and submerged inside a larger culture tube containing broth and the test organism. As the bacteria ferment the sugar in the broth, any gas produced rises and becomes trapped inside the inverted tube as a visible bubble, giving a simple, reliable indicator of gas-producing fermentation. This makes the setup useful both for teaching the principles of microbial metabolism and for diagnostic identification work that relies on sugar fermentation patterns.
The glass construction allows the trapped gas bubble to be seen clearly against the broth, and the tube can be sterilised and reused across repeated tests when properly cleaned.
Technical Specifications
| Parameter | Detail |
|---|---|
| Body material | Laboratory glass |
| Function | Traps gas produced during bacterial fermentation for visible detection |
| Typical use | Microbiology teaching and sugar-fermentation diagnostic tests |
Applications
- Detecting gas-producing fermentation of sugars by bacterial cultures
- Microbiology teaching demonstrations of microbial metabolism
- Diagnostic identification tests that rely on fermentation patterns
- General microbiology coursework in schools and colleges
Care & Handling
- Sterilise before and after use when working with live bacterial cultures
- Confirm the glass type and temperature rating before autoclaving
- Handle with care to avoid trapping air incorrectly, which can be mistaken for a fermentation gas bubble
- Dispose of used cultures and broth according to your laboratory’s biosafety procedures
Why Choose LabEquip
LabEquip supplies microbiology glassware alongside our wider lab glassware range and chemistry lab equipment to schools, colleges and research laboratories across India. For bulk or institutional requirements, contact us and our team will help confirm the right setup for your practical work.
Frequently Asked Questions
What is a microbial fermentation testing tube used for?
It is used in microbiology to detect gas production during bacterial fermentation of a sugar or other substrate, most often as part of a Durham tube style setup.
How does the tube detect gas production?
A small inverted tube is placed inside the culture tube; as fermenting bacteria produce gas, it collects as a visible bubble inside the inverted tube rather than escaping into the surrounding broth.
What kind of experiments use this tube?
It is commonly used in microbiology teaching and diagnostic work to test whether a bacterial culture ferments a particular sugar with gas production.
Can the tube be autoclaved for sterilisation?
Borosilicate glass fermentation tubes generally withstand autoclaving; confirm the exact glass type and temperature rating of this tube before sterilising.
Is the tube reusable?
Yes, after sterilisation and thorough cleaning between uses, the tube can be reused for further fermentation tests.
Does LabEquip supply fermentation testing tubes for bulk or institutional orders?
Yes. LabEquip supplies microbial fermentation testing tubes to schools, colleges and laboratories across India, including bulk and institutional orders. Contact us for a quotation.
Last Updated: September 2026
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