Kuhne’s Fermentation Tube

Product Code : SCL-LG-11977

Kuhne’s Fermentation Tube (SKU SCL-LG-11977) is a laboratory 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. It suits anaerobic-respiration demonstrations in school biology and fermentation practicals in college botany and microbiology. Science Lab Supplies prices and dispatches the tube from Ambala, India, for schools, colleges, tender contractors and distributors.

Specifications

The table below separates each detail of the Kuhne fermentation tube. In short, a closed vertical arm is joined to a side arm or bulb through which the yeast and sugar mixture is poured in, gas collects by liquid displacement without any power supply, and capacity, material and graduations 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 can 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, with incubation temperature read on a non-mercury Glass Thermometer.
• B.Sc. botany and microbiology practicals: comparing fermentation of different sugars by yeast over equal times measured with School Digital Stopwatches.
• Testing the collected gas with Potassium Hydroxide Flakes made up into solution 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 supply is 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 can be sourced by the laboratory or added to the same quotation as separate lines.

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. Say how many practical groups you are equipping on the contact page, save the tube alongside your other biology items in the enquiry cart, or check tender steps on the lab tender page.

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 before you place the order.

Who supplies Kuhne’s Fermentation Tube?
The tube is offered by Science Lab Supplies, an Ambala supplier in India that sets out packing and shipping on each quotation 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, then closing the side opening without creating pressure, makes the observation reliable.

Related Respiration and Fermentation Apparatus

Fermentation is taught alongside aerobic respiration, photosynthesis and yeast biology. These items from the Lab Glassware, Biology Lab Equipment, Lab Chemicals and prepared-slide ranges extend the practical in each of those directions, and any of them can share a quotation with the tube.

• Respirometer with Stand — cork-closed respiration tubes linked by extensions to a graduated manometer.
• Germinating Seed Respiration Demonstration Kit — glass tubes with capillaries, stand, KOH and two bottles of dye.
• Kit for Demonstration of CO2 Emission and Heat Production in Germinating Seeds — two 250 ml Erlenmeyer flasks, baryta water and a 0–100 °C thermometer.
• Wilmott’s Bubbler — gas bubbles from an aquatic plant counted over a fixed period.
• Kit for Experiments on Photosynthesis — CO2 sensor and platinum temperature sensor for breathing and germination studies.
• Fungal Yeast Reproduction Prepared Slide — ready-to-view slide of yeast cells budding.
• Sucrose Crystal — crystalline carbohydrate reagent, C12H22O11, for preparing sugar solutions.

Browse the full Lab Glassware range, the Biology Lab Equipment range, or all school lab equipment.

Last updated: 9 October 2026