Respiration Apparatus
Product Code : LSK-GBP-11031
Respiration Apparatus (SKU LSK-GBP-11031) is a two-tube set for comparing inhaled and exhaled air. Each boiling tube has a stopper carrying one short and one long length of 5 mm glass tubing, and the tubes are joined by PVC tubing and a plastic T-piece so a student can breathe through both by way of the T-piece. It suits breathing practicals from middle school to senior secondary biology. Science Lab Supplies fabricates the apparatus in its Saha, Ambala works (Plot 448, HSIIDC Industrial Area, India) for schools, colleges, contractors and distributors.
Specifications
Every component of the inhaled-versus-exhaled air apparatus is tabled below. In short, there are two stoppered boiling tubes, each fitted with a short and a long piece of 5 mm glass tubing, connected through PVC tubing to a plastic T so that air drawn in and air breathed out pass through different tubes.
| Specification | Value |
|---|---|
| SKU | LSK-GBP-11031 |
| Boiling tubes | 2, each with a stopper |
| Glass tubing per tube | 2 lengths: one short, one long |
| Glass tubing size | 5 mm |
| Connecting tubing | PVC tubing |
| Junction | Plastic T-piece |
| Application | Inhaled and exhaled air tests |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Respiration Apparatus
The respiration apparatus shows that exhaled air contains more carbon dioxide than inhaled air. With an indicator such as lime water in both tubes, a student breathes gently in and out through the T-piece; inhaled air is drawn through one tube and exhaled air bubbles through the other, which turns milky first.
- Class 7 science (respiration in organisms) and Class 10 life processes: comparing carbon dioxide in inhaled and exhaled air.
- Class 11 biology (breathing and exchange of gases): linking the test to gas exchange in the lungs, alongside the Respiratory System wall chart.
- Fitness investigations: repeating the test after exercise, with airflow checked on the Peak Flow Meter.
Breathe slowly so that liquid is never sucked towards the mouth, wipe the T-piece end between students, and keep lime water away from the eyes.
Standard Scope of Supply
The apparatus consists of two boiling tubes with stoppers, two lengths of 5 mm glass tubing for each tube (one short and one long), PVC connecting tubing and a plastic T-piece. Lime water or another carbon dioxide indicator and a rack for the tubes can be added to the quotation.
Packing, MOQ and Lead Time
You can ask for one apparatus for a demonstration or a quantity for each group in the class. The quotation states packing, delivery time and price for that number, and Science Lab Supplies can include lime water or breathing kits on the same document.
Supported by an Importer-Exporter Code, Science Lab Supplies can ship to buyers in the Philippines, Nepal, Bangladesh, Zambia, Rwanda and South Africa. Start an enquiry from the contact page, gather items in the enquiry cart for one combined price, or use the lab tender page for public procurement.
Frequently Asked Questions
What test is the Respiration Apparatus used for?
It is used for inhaled and exhaled air tests: comparing how quickly an indicator such as lime water changes when exhaled air, rather than inhaled room air, is passed through it.
Why does each tube have a short and a long glass tube?
The long tube dips into the liquid and the short one stays above it. Arranged in opposite directions on the two tubes, they send inhaled air through one tube and exhaled air through the other.
What size is the glass tubing?
The glass tubing is 5 mm. Two lengths go into each stopper, one short and one long, and PVC tubing with a plastic T-piece links the two boiling tubes together.
Is the apparatus made by Science Lab Supplies?
Yes. The tubes, stoppers and connections are put together at the company's Ambala-district factory in Saha, so it is manufactured, packed and quoted by Science Lab Supplies rather than resold.
Related Breathing and Respiration Apparatus
These kits, meters and lung models cover the rest of a breathing lesson, from the mechanics of the diaphragm to measuring breath volume and organism respiration. Each one can be priced on the same quotation as the respiration apparatus for a complete set of breathing practicals.
- Kit for Experiments with Breathing — lung model with vacuum pipette and a bottle of lime water.
- Respirometer — boiling tubes on a graduated manometer with a thermobarometer control.
- Lung Volume Bags, Plastic Transparent — printed clear bags of 40–100 micron plastic.
- Lung Capacity Meter — piston-in-cylinder meter, 5% accuracy, 60–900 L/min.
- Human Lung Demonstration Model — bell jar with rubber balloons and a thin rubber diaphragm.
- Lung Model Demo Kit — bell jar, Y adapter, balloons and latex sheet to build a lung model.
- Respiratory Apparatus — laminated wall chart, 70 x 100 cm.
Browse the General Biology Products range, school respiration kits under Biology Lab Equipment, or everything in Biology Lab.
Last updated: 9 October 2026
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