Kuhne’s Fermentation Tube

Product Code : SCL-LG-11977

Kuhne’s Fermentation Tube (SKU SCL-LG-11977) is a glass apparatus that shows yeast producing carbon dioxide during alcoholic fermentation: the gas collects at the top of a closed vertical arm and pushes the liquid level down. Biology teachers use it to demonstrate anaerobic respiration in school, and botany and microbiology departments use it in college practicals. From Ambala, India, Science Lab Supplies provides the tube to schools, colleges, training institutes, tender contractors and distributors.

Specifications

The tube follows the recognised Kuhne pattern: a closed vertical arm joined to a side arm or bulb through which the yeast and sugar mixture is poured in. Gas collection works by liquid displacement and needs no power. Capacity, material, graduations and dimensions are not in the listing and are confirmed on the quotation.

Applications and Experiments for Kuhne’s Fermentation Tube

The fermentation tube gives clear, visible evidence that yeast releases a gas when it breaks down sugar without oxygen. Students watch the gas space grow in the closed arm, record the fall in liquid level, and compare fermentation under controlled differences in sugar, temperature or time.

• NCERT Class 10 biology (life processes): anaerobic respiration in yeast.
• NCERT Class 11 biology (respiration in plants): alcoholic fermentation producing ethanol and carbon dioxide.
• B.Sc. botany and microbiology practicals: comparing fermentation of different sugars by yeast.
• Testing the collected gas with potassium hydroxide to show that it is carbon dioxide.

Fill the closed arm completely at the start so no air is mistaken for fermentation gas. Potassium hydroxide is corrosive and should be handled only by trained staff or under direct supervision.

Standard Scope of Supply

The listing covers one Kuhne’s Fermentation Tube, with capacity and configuration confirmed on the quotation. Yeast, sugar solution, a cotton plug, reagents such as potassium hydroxide and measuring equipment are not confirmed as included.

Packing, MOQ and Lead Time

Quotations are prepared for a single tube or a batch for every practical group, each stating packing, delivery time and price for the quantity. Respiration, photosynthesis and transpiration apparatus can go on the same request when you are sourcing school biology lab equipment in India together.

Holding an Importer-Exporter Code, Science Lab Supplies is a registered exporter that can ship to buyers in the Philippines, Nepal, Bangladesh, Zambia, Rwanda and South Africa. Start an enquiry on the contact page, add the tube to the enquiry cart, or read the lab tender page for tender procedures.

Frequently Asked Questions

What happens inside Kuhne’s Fermentation Tube?
Yeast ferments the sugar solution into ethanol and carbon dioxide. The carbon dioxide rises into the closed arm and displaces the liquid, so the growing gas space shows that fermentation is under way.

Can it measure the fermentation rate?
It shows relative gas production through the change in liquid level. Quantitative readings depend on whether the supplied tube carries graduations, which the quotation confirms.

Who supplies Kuhne’s Fermentation Tube?
Supply comes from Science Lab Supplies in Ambala, India, which quotes, packs and ships the tube for biology laboratories, colleges and tender contractors.

Why must the closed arm be full of liquid at the start?
Any air left in the closed arm could be mistaken for gas produced by the yeast. Filling it completely makes the observation reliable.

Related Respiration and Plant Physiology Apparatus

Fermentation is taught with aerobic respiration, photosynthesis and transpiration, and the yeast mixture needs a flask to prepare it in. These four items complete that set of practicals and can be quoted with the fermentation tube.

• Respirometer with Stand — aerobic respiration in germinating seeds.
• Wilmott’s Bubbler — oxygen release during photosynthesis.
• Farmers Potometer — water uptake and transpiration.
• Borosilicate Conical Flask — preparing the yeast and sugar mixture.

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Last updated: 25 September 2026