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Bernoulli Tube Apparatus
Bernoulli Tube Apparatus (Product Code: SLE/PHY/23) is a glass flow-tube set used to explain Bernoulli's theorem by showing how the pressure and speed of a flowing liquid change with the bore of a tube, in physics labs. It pairs a Bernoulli tube with a central narrowed portion and a constant-bore gradient tube, each 500 x 13 mm with three side tubes for glass manometers. This physics demonstration kit is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Flow tubes | Bernoulli tube with central narrowed portion; constant-bore gradient tube |
| Flow tube size | Each 500 x 13 mm (length x outer diameter) |
| Side tubes | Three sealed-in short side tubes on each flow tube, each 25 mm long, spaced about 150 mm apart |
| Constriction tapping | On the Bernoulli tube, the middle side tube comes out from the central narrowed portion |
| Manometer tubing | 6 lengths of glass tubing, connected to the side tubes for use as manometers |
| Outlets | 2 swan-necked outlet tubes |
| Connectors | 8 small pieces of rubber connecting tubing for joining the glass tubes as needed |
| Purpose | Observing the variation in pressure and speed of flow of an incompressible fluid with the bore or cross-section of the tube |
| Product code | SLE/PHY/23 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Bernoulli Tube Used For?
Water from a steady supply is run through one flow tube at a time, with a length of glass tubing standing upright in each side tube as a manometer and a swan-necked outlet at the far end. In the constant-bore gradient tube, the water levels in the three manometers fall evenly along the tube, showing the pressure drop along a uniform pipe. In the Bernoulli tube, the middle manometer, which taps the narrowed portion, stands noticeably lower than its neighbours.
That dip is Bernoulli's theorem in action: to pass the same volume each second through the constriction, the water must speed up, and its pressure falls. Comparing the two tubes side by side separates this effect from the ordinary friction loss. Keep the flow steady, clamp the manometer tubes upright, and handle the glass with care when fitting the rubber connectors. It is a clear, low-cost piece of physics lab equipment in India's senior-secondary and college fluid-flow practicals.
What to Specify When Ordering
- Number of complete sets; each set includes both flow tubes, 6 glass tubing lengths, 2 swan-necked outlets and 8 rubber connectors.
- Any spare glass tubing lengths or rubber connectors you want quoted.
- Stands or clamps for holding the manometer tubes upright, if your lab needs them.
OEM Manufacturer
Jain Scientific Equipments Private Limited, known by its trading name ScienceLab, is the OEM of the Bernoulli Tube Apparatus. The set is manufactured at the company's licensed factory at Saha, Ambala, Haryana, India, and supplied factory-direct to schools, colleges, dealers and importers. Because glassware can break in use, replacement flow tubes, glass tubing or connectors are handled by the manufacturer itself — just ask us. More detail is on the ScienceLab profile page.
Related Physics Lab Equipment
These items support the experiment or take it further:
- Bernoulli's Theorem Demonstration module — a larger engineering-level unit for the same theorem.
- Rubber Tubing — for connecting the flow tube to the water supply.
- Borosilicate Glass Tubing — spare tubing for extra or replacement manometers.
- Retort Stand — holds the flow tube and manometer tubes steady.
See more apparatus in Physics Lab Equipment.
Frequently Asked Questions
What does the Bernoulli Tube Apparatus demonstrate?
The Bernoulli Tube Apparatus demonstrates Bernoulli's theorem: where a flowing incompressible liquid passes through a narrower section, its speed increases and its pressure falls. The manometer tapping at the narrowed portion of the Bernoulli tube shows this as a lower liquid level.
What is included in the Bernoulli Tube Apparatus?
The Bernoulli Tube Apparatus includes a Bernoulli tube with a central narrowed portion, a constant-bore gradient tube, 6 lengths of glass tubing, 2 swan-necked outlet tubes and 8 small pieces of rubber connecting tubing for joining the glass parts.
What size are the Bernoulli apparatus flow tubes?
Each flow tube of the Bernoulli Tube Apparatus measures 500 x 13 mm (length x outer diameter). Each has three sealed-in side tubes, 25 mm long and spaced about 150 mm apart, where glass tubing lengths are attached as manometers.
Why does the set include a constant-bore gradient tube?
The constant-bore gradient tube in the Bernoulli Tube Apparatus shows the steady pressure fall along a uniform tube. Comparing it with the Bernoulli tube lets students separate the pressure drop caused by the constriction from the ordinary loss along the length of the tube.
Who manufactures the Bernoulli Tube Apparatus?
Jain Scientific Equipments Pvt Ltd, trading as ScienceLab, manufactures the Bernoulli Tube Apparatus as the OEM at its own factory in Saha, Ambala, Haryana, India. It is supplied factory-direct, and replacement glass parts can be requested from the manufacturer.
What details should a quotation request for SLE/PHY/23 include?
A quotation request for the Bernoulli Tube Apparatus, code SLE/PHY/23, should state the number of sets, any spare tubing or connectors, and the delivery location in India or abroad. Send it through the ScienceLab contact page or enquiry cart.
Request a Quote
Request the Bernoulli Tube Apparatus through the contact page or add it to the enquiry cart with any spares you need. ScienceLab quotes directly as the manufacturer.
Last updated: 24 September 2026
