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Respirometer
Respirometer (Product Code: SLE/BL/040) is a compact manometer apparatus used to compare the rates at which small organisms absorb or give off gases during respiration in school and college biology laboratories. Students set up two stoppered boiling tubes — one for the organisms, one acting as a control thermo-barometer — joined by three-way taps to a graduated manometer. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India, among its biology lab equipment in India.
Specifications
| Parameter | Detail |
|---|---|
| Chambers | Two stoppered boiling tubes |
| Connection | Three-way taps to either limb of a graduated manometer |
| Experimental tube | Holds the organisms; fitted with a syringe for altering the manometer liquid level during set-up |
| Control tube | Acts as a control thermo-barometer |
| Organism support | Complete with wire baskets for supporting organisms |
| Working principle | CO2 given off by the respiring organisms is absorbed by potassium hydroxide in the experimental chamber, changing the liquid level in the manometer tube |
| Purpose | Comparing rates of absorption or evolution of gases by small organisms during respiration |
| Product code | SLE/BL/040 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Respirometer Used For?
A typical practical places germinating seeds or small invertebrates such as woodlice on the wire basket of the experimental tube, above a layer of potassium hydroxide solution; the control tube is prepared the same way with inert material, such as glass beads, in place of living organisms. With the taps open, the syringe brings the manometer liquid to a starting level, then the taps are closed and timing begins. As the organisms take in oxygen and their carbon dioxide is absorbed, the gas volume in the experimental tube falls and the liquid moves along the graduated scale.
Readings taken at regular intervals give a rate that can be compared between species, temperatures or stages of germination. The thermo-barometer is what makes those comparisons fair: room temperature and air pressure act on both tubes equally, so only the organisms' gas exchange shows as a difference, and standing both tubes in one water bath helps further. Potassium hydroxide is corrosive, so wear eye protection, keep the organisms clear of the liquid and return live animals to their habitat — routine good practice for any biology lab setup in schools in India.
OEM Manufacturer
The Respirometer is built by Jain Scientific Equipments Private Limited, which trades as ScienceLab. The company is the OEM (original equipment manufacturer) of this apparatus and makes it at its own licensed factory at Saha, Ambala, Haryana, India, rather than buying it in from a trader. Schools, colleges, dealers and importers are supplied factory-direct, and if you later need replacement wire baskets or extra units for more benches, ask us — the request is handled by the manufacturer itself. More about the company is on our company profile.
Related Biology Lab Equipment
Chemicals and apparatus that complete a respiration-rate investigation:
- Potassium Hydroxide — the carbon dioxide absorbent for the experimental chamber
- Kit for Demonstrating Seed Respiration in Germination — a complementary seed respiration activity
- Water Bath — holds both tubes at a steady temperature during readings
- Volumeter Respirometer — an alternative respirometer design from the botany range
- Respiration Apparatus — a simpler qualitative test of inhaled and exhaled air
For more physiology apparatus, go to the Biology Lab Equipment category page.
Frequently Asked Questions
Who manufactures the Respirometer?
The Respirometer (SLE/BL/040) is manufactured by Jain Scientific Equipments Private Limited, trading as ScienceLab, which is the OEM and builds it at its own licensed factory at Saha, Ambala, Haryana, India. Quotations, repeat orders and spare-part requests go straight to the manufacturer.
Is potassium hydroxide supplied with the Respirometer?
No, potassium hydroxide is not listed as part of the Respirometer, which comes complete with wire baskets for supporting the organisms. The carbon dioxide absorbent can be ordered separately as Potassium Hydroxide from our chemical range.
What is the second tube of the Respirometer for?
The second boiling tube of the Respirometer acts as a control thermo-barometer. Because temperature and air-pressure changes affect both tubes equally, the difference shown on the graduated manometer reflects only the gas exchange of the organisms in the experimental tube.
What does the syringe on the Respirometer do?
The syringe fitted to the organism tube of the Respirometer alters the level of liquid in the manometer during set-up, so each run starts from a known reading before the three-way taps are closed and timing begins.
What is the scale range of the Respirometer's manometer?
The Respirometer's manometer is graduated, but its scale range and divisions are not stated in our product information. Please ask through the contact page and we will confirm the scale details for the units you are quoted.
Is a calibration certificate available for the Respirometer?
Calibration documentation for the Respirometer should be discussed with us before you order. Mention your requirement in the enquiry and we will advise what paperwork can be provided with the apparatus for your school, college or tender submission.
Can ScienceLab supply the Respirometer in bulk or for export?
Yes. ScienceLab supplies the Respirometer to schools, colleges, dealers and importers in India and international markets. Send the number of units, any reagents or water baths you need and the delivery location through the contact page for a factory-direct quotation.
Request a Quote
Quotations for the Respirometer come direct from the manufacturer. Write to us on the contact page with your quantity, or add the apparatus and its reagent to the enquiry cart.
Last updated: 24 September 2026
