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Bar Compound Copper & Iron
Bar Compound Copper & Iron (Product Code: SLE/PHY/20) is a bimetallic compound bar used to demonstrate the principle of the thermostat in school physics and general science labs. An iron strip and a copper-based strip are riveted together from end to end and mounted in a wooden handle, and when the bar is heated the unequal expansion of the two metals makes it bend. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Demonstrates | Principle of the thermostat |
| Construction | Bimetal strip: one strip of each metal, riveted together from end to end |
| Metals | Iron and a copper-based strip. The product name lists copper; our earlier catalogue description lists brass. Please confirm the metal pair in your enquiry. |
| Handle | Wooden handle |
| Behaviour on heating | The bar bends because the two metals expand unequally |
| Product code | SLE/PHY/20 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Compound Bar Used For?
As a piece of physics lab equipment for India's heat and expansion lessons, it takes only a flame to use. Hold the bar by its wooden handle and pass it slowly through the flame so both strips warm evenly. The copper-based strip expands more than the iron for the same rise in temperature, but the rivets stop the strips from sliding past each other, so the whole bar curls with the iron on the inside of the curve. As it cools, the bar straightens again, showing that the effect is reversible.
That bending movement is exactly what switches a thermostat: in an iron, a room heater or a fire alarm, a bimetal strip moves as it warms and opens or closes an electrical contact. Students can predict which way the bar will bend before heating, then check. Keep the heating gentle, rest the hot bar on a heat-proof mat afterwards, and never touch the metal until it has cooled.
What to Specify When Ordering
- Confirm the metal pair you need: the product name lists copper and iron, while the earlier catalogue text lists brass and iron.
- Number of compound bars, for example one per student group or one for teacher demonstration.
- Whether a heat source such as a Bunsen burner should be quoted with the bars.
OEM Manufacturer
ScienceLab is the trading name of Jain Scientific Equipments Private Limited, the OEM (original equipment manufacturer) of the Bar Compound Copper & Iron. The company manufactures it at its licensed factory in Saha, Ambala, Haryana, India, and sells factory-direct to schools, colleges, dealers and importers. Jain Scientific Equipments Private Limited is a registered MSME whose major activity is manufacturing (Udyam UDYAM-HR-01-0003714), and export consignments move under Importer-Exporter Code AAECJ8618A issued by the DGFT. See the company profile for more.
Related Physics Lab Equipment
For a full set of thermal expansion demonstrations, pair the compound bar with:
- Bimetallic Strip — another bimetal item for the same thermostat lesson.
- Ball & Ring Apparatus — shows expansion of a solid when heated in a single metal.
- Apparatus Bar & Gauge — demonstrates linear expansion of a heated bar.
- Bunsen Burner — a heat source for warming the bar evenly.
More apparatus is listed in Physics Lab Equipment.
Frequently Asked Questions
What does the Bar Compound Copper & Iron demonstrate?
The Bar Compound Copper & Iron demonstrates the principle of the thermostat. Its two riveted metal strips expand by different amounts when heated, so the bar bends, just as the bimetal strip inside a thermostat bends to open or close an electrical contact.
Which way does the compound bar bend when heated?
When the Bar Compound Copper & Iron is heated, it bends with the iron strip on the inside of the curve, because the copper-based strip expands more than iron. On cooling, the bar returns towards its original straight shape.
What metals is the compound bar made of?
The Bar Compound Copper & Iron joins an iron strip to a copper-based strip, riveted from end to end in a wooden handle. The product name lists copper, while our earlier catalogue text lists brass, so please confirm the metal pair with ScienceLab when you enquire.
Who manufactures the Bar Compound Copper & Iron?
Jain Scientific Equipments Pvt Ltd, trading as ScienceLab, manufactures the Bar Compound Copper & Iron as the OEM at its own factory in Saha, Ambala, Haryana, India. It is supplied factory-direct to schools, colleges, dealers and importers.
How should the compound bar be heated safely?
Hold the Bar Compound Copper & Iron only by its wooden handle and warm it gently and evenly in a flame. Place the hot bar on a heat-proof mat after the demonstration and do not touch the metal strips until they have cooled completely.
How do I request a quotation for SLE/PHY/20?
To request a quotation for the Bar Compound Copper & Iron, code SLE/PHY/20, send the quantity, the metal pair you require and your delivery location through the ScienceLab contact page. ScienceLab supplies buyers in India and international markets.
Request a Quote
Send your requirement for the Bar Compound Copper & Iron through the contact page or add it to the enquiry cart. As the manufacturer, ScienceLab quotes directly and can confirm the metal pair with you.
Last updated: 24 September 2026
