Linear Expansion Apparatus

Product Code : EL-H-10398

Specifications

Steam must be supplied from a separate boiler or steam generator. Whether a thermometer is included can be confirmed at the time of quotation.

How the linear expansion experiment is done

When a metal rod is heated, its length increases in proportion to its original length and to the rise in temperature. The coefficient of linear expansion is alpha = delta L / (L x delta T), where L is the initial length, delta L the increase in length and delta T the temperature rise. In this apparatus steam passes through the chamber around the rod, raising it to close to 100 deg C, and the indicator at the end shows the elongation straight away.

1. Measure the length of the metal rod and note the room temperature.
2. Insert the rod in the steam chamber and set the indicator to its starting reading.
3. Fit a thermometer in the thermometer tube and connect the steam supply to the intake, with the outlet led to a drain.
4. Pass steam until the thermometer reading and the indicator become steady.
5. Record the final temperature and the elongation, then calculate alpha.

Testing rods of other metals in the same way shows that each metal has its own coefficient, a point that matters in bridge joints, railway track gaps and bimetallic thermostats.

Key features

• Steam chamber heats the whole length of the rod
• Indicator mounted at one end registers expansion as soon as steam is applied
• Heat jacket with three tubes: intake, outlet and thermometer insertion
• Makes the lengthening of a metal rod visible and measurable for students
• Runs from a standard laboratory steam source

Documentation and supply

Installation instructions and a manual are supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.

Lab Exports manufactures the Linear Expansion Apparatus 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.

Related Heat products

• Pyrometer (EL-H-10397)
• Searle's Thermal Conductivity Apparatus (EL-H-10399)
• Bar and Gauze Apparatus Aluminium (EL-H-10396)
• Lee's and Charlton's Apparatus (EL-H-10400)
• Ball and Ring Apparatus (EL-H-10395)
• Joule's Calorimeter (EL-H-10401)

The full range is in the Heat section of the Physics Lab range.

Frequently asked questions

How is the rod heated in the linear expansion apparatus?

By steam passed through the chamber around the rod. A steam source is not included with the apparatus.

How is the expansion read?

An indicator mounted at one end of the rod registers the increase in length as soon as the rod begins to warm.

What are the three tubes on the heat jacket for?

One is the intake, one the outlet and the third takes a thermometer so the rod temperature can be recorded.

What is the price of the Linear Expansion Apparatus?

Prices are not published on the website. Add the Linear Expansion Apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-H-10398 and the quantity, to receive a quotation.

Does Lab Exports manufacture the Linear Expansion Apparatus?

Yes. Lab Exports manufactures the Linear Expansion Apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-H-10398.

Request a quote

Email [email protected] with the house code EL-H-10398 and the quantity, or add the Linear Expansion Apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.