Fluid Pressure Apparatus (Spouting Cylinder)

Product Code : EL-POM-10367

Specifications

How the spouting cylinder experiment is done

Pressure in a liquid at rest depends on the depth below the free surface: p = rho g h, where rho is the density of the liquid, g the acceleration due to gravity and h the depth. The three orifices are the same size and lie one above another, so any difference between the jets comes only from the depth of water above each hole.

1. Stand the cylinder on a block at the edge of a sink or large tray, so the jets fall some distance before landing.
2. Close the orifices with fingers or tape and fill the cylinder with water.
3. Open all three orifices together and watch the three jets.
4. Compare where each jet lands; top up the water to keep the level steady if repeated readings are needed.

The lowest orifice has the greatest depth of water above it, so its jet leaves fastest and shoots out furthest, while the top jet falls close to the cylinder. The speed of each jet follows Torricelli's result, v = sqrt(2gh). As the water level drops, all three jets shorten, which shows the same rule a second time. If the jets are allowed to land on the same bench as the cylinder, the height of fall also matters, and older students can show that the landing distance is then greatest for a hole at half the water depth.

Key features

• Sheet metal cylinder, 400 mm long and 68 mm in diameter
• Three orifices of equal size, so only depth differs between the jets
• Orifices set at different heights down one side
• Works with ordinary tap water, with no gauges or pumps needed
• Quick, visible result suited to whole-class demonstration

Documentation and supply

Most Lab Exports products carry a one-year manufacturer warranty.

Lab Exports manufactures the spouting cylinder at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.

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The full range is in the Properties of Matter section of the Physics Lab range.

Frequently asked questions

What does the spouting cylinder demonstrate?

It demonstrates that pressure in a liquid increases with depth, because the jet from the lowest orifice leaves with the greatest speed.

How many orifices does it have?

Three, of equal size, at different heights on one side of the cylinder.

What size is the cylinder?

It is a sheet metal cylinder 400 mm by 68 mm in diameter.

What is the price of the spouting cylinder?

Prices are not published on the website. Add the spouting cylinder to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-POM-10367 and the quantity, to receive a quotation.

Does Lab Exports manufacture the spouting cylinder?

Yes. Lab Exports manufactures the spouting cylinder at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-POM-10367.

Request a quote

Email [email protected] with the house code EL-POM-10367 and the quantity, or add the spouting cylinder to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.