Simple Respirometer
Product Code : SCL-BLE-11635
Simple Respirometer (SKU SCL-BLE-11635) compares gas exchange in living organisms by pressure change. Two tubes closed with corks carry three-way taps, and the tap extensions connect to a graduated manometer, so a change in gas volume in one tube moves the manometer liquid. It is used for respiration practicals with germinating seeds or small organisms in senior school and college biology. Science Lab Supplies offers it from Ambala, India, to schools, colleges, tender contractors and distributors.
Specifications
This respirometer has a deliberately simple layout: a pair of corked tubes, a three-way tap fixed to each cork, and extensions running from the taps to the two limbs of a graduated manometer. The table sets out each of these parts and the connection between them on separate rows.
| Specification | Value |
|---|---|
| SKU | SCL-BLE-11635 |
| Tubes | 2 |
| Closures | Corks |
| Taps | Three-way taps fixed to the corks |
| Manometer | Graduated |
| Connection | Tap extensions connected to the manometer |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Simple Respirometer
One tube holds respiring material, such as germinating seeds or small invertebrates, and the other acts as a control. As oxygen is used and carbon dioxide is absorbed, the manometer liquid moves. It suits CBSE/NCERT Class 10 and Class 11 respiration topics and B.Sc. zoology or botany practicals.
- Class 11 respiration in plants: measuring oxygen uptake by germinating seeds, with carbon dioxide absorbed by a solution made from Potassium Hydroxide Flakes.
- Comparing respiration rates of germinating and dry seeds, or of seeds at different temperatures, logged on a Thermometer (with no Mercury).
- Using the three-way taps to open both tubes to air, level the manometer, and then close them to start timing.
Potassium hydroxide is corrosive: keep it away from the organisms and handle it with gloves and eye protection.
Standard Scope of Supply
The respirometer is supplied with its two corked tubes, three-way taps and graduated manometer, connected as described above. Manometer liquid, potassium hydroxide and specimens are not included, and can be sourced locally or added to the same quotation where they are available from Science Lab Supplies.
Packing, MOQ and Lead Time
Quotations are prepared for one respirometer or a full set for every pair of students. Each lists packing, delivery time and price for the quantity stated, and laboratories can add thermometers, potassium hydroxide or other respiration apparatus to the same request for a single delivery.
With its Importer-Exporter Code, Science Lab Supplies is able to ship to buyers in Peru, Egypt, Iraq, Nigeria, Kenya and Ghana. The contact page and the enquiry cart both take orders of any size, while the lab tender page covers school and university tenders.
Frequently Asked Questions
How does the respirometer work?
Respiring organisms in one corked tube change the gas volume, which shifts the liquid in the graduated manometer connected through the three-way taps. The second tube acts as a control for temperature and pressure changes.
What are the three-way taps for?
They are fixed to the corks and let each tube be opened to the air or connected to the manometer. Opening them levels the liquid before a run; turning them starts the measurement.
Who supplies the Simple Respirometer?
Science Lab Supplies supplies the Simple Respirometer through its Ambala, India office. Quotations go straight to schools, colleges, tender contractors and distributors, with packing and delivery stated for each order.
Which organisms can be used?
Germinating seeds such as peas or beans are the simplest choice. Small invertebrates such as woodlice or maggots can also be used, provided they are kept out of contact with the potassium hydroxide.
Related Respirometers and Respiration Kits
These products cover the same respiration practicals with different set-ups, from stand-mounted and basket-equipped respirometers to seed kits and a standalone manometer. Grouped on one quotation, they let a department give each group a respiration station suited to its level of study.
- Respirometer with Stand — the corked-tube and manometer design held on a supporting stand.
- Respirometer — one boiling tube for organisms, the other a control thermobarometer.
- Respirometer — complete with wire baskets for supporting the organisms.
- Germinating Seed Respiration Demonstration Kit — stand with glass capillary tubes and two bottles of dye.
- Cellular Respiration — 1 ml pipet, plastic vials and parafilm for building microrespirometers.
- Simple Glass Manometer — 2 mm bore tube on a 140 x 70 mm acrylic base.
- Kit for Demonstration of CO2 Emission and Heat Production in Germinating Seeds — 500 ml spherical flask with three nozzles and a single-hole stopper.
Browse the full Biology Lab Equipment range, the General Biology Products range, or all school lab equipment.
Last updated: 9 October 2026
