Expansion Apparatus Manufacturer,Supplier and Exporter in India

Expansion Apparatus (Product Code: SLE/H/17) demonstrates the linear expansion of solids by turning a very small change in a bar's length into a visible pointer movement. An expansion bar sits across the top of two cast-metal uprights: one end is fixed, the other rests beneath a friction pointer that moves along a scale reading 0 to 90 as the bar lengthens. It is used in school and college heat lessons, and it is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, a physics instruments supplier to institutions in India and international markets.

Specifications

Typical Use

With the pointer noted at its starting position, the teacher warms the expansion bar with a flame moved steadily along its length. Because one end of the bar is held fast, all of the lengthening appears at the free end, which drags the friction pointer across the 0 to 90 scale. Students record the pointer movement as heating continues and then watch it respond again as the bar cools and contracts. The demonstration makes a good starting point for discussing why railway lines, bridges and pipelines are designed with room to expand.

The cast uprights and paired support rods keep the bar steady during heating, so the reading reflects expansion rather than wobble. Heat evenly rather than at one spot, allow the bar to cool completely before handling it, and keep the scale area free of soot for clear readings. As a demonstration model for the physics lab it works well at the front bench, where the pointer can be seen by a group gathered around it.

Manufacturer

Jain Scientific Equipments Private Limited manufactures the Expansion Apparatus in Ambala, Haryana, and markets its equipment under the ScienceLab name to schools, colleges and distributors. Visit our company profile for an overview of the business.

Related Laboratory Equipment

Apparatus that extends a thermal-expansion lesson:

• Bunsen Burner — a flame source for heating the expansion bar
• Expansion Of Liquids Apparatus — carries the same idea from solids on to liquids
• Apparatus Bar & Gauge — a second way of showing that heated solids grow in size
• Conductivity of Metal Apparatus — follows on with how quickly heat travels through different metals

For more heat apparatus, visit the Heat category.

Frequently Asked Questions

What does the apparatus demonstrate?
The linear expansion of a solid bar when it is heated, shown by a pointer moving along a 0 to 90 scale.

Does the scale read in millimetres?
The scale is marked 0 to 90; its units are not stated in our listing, so it is best used to compare expansion. Contact us if you need scale details.

Are bars of different metals included?
The apparatus is described with one expansion bar. If you want to compare several metals, please ask us about options before ordering.

What heat source should I use?
A heat source is not listed among the supplied items; a laboratory burner is commonly used to warm the bar along its length.

How is the bar held in place?
It is fixed to one cast-metal upright and rests beneath the friction pointer on the other, with a pair of plated metal rods linking the uprights.

Can you supply this in quantity for several schools?
Yes, we handle bulk orders for institutions and distributors in India and international markets. Share quantities and destination; warranty terms are confirmed in the quotation.

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Last updated: 24 September 2026