Bimetallic Strip
Product Code : LSK-PL-10342
Bimetallic Strip (SKU LSK-PL-10342) is a 200 x 15 mm strip of brass and steel riveted together and set in a wooden handle. Held in a flame, it curls because brass expands more than steel, giving a clear picture of differential thermal expansion. It is used in school and college heat lessons and to explain thermostats. The strip is manufactured by Science Lab Supplies in Saha, Ambala, India (Plot 448, HSIIDC Industrial Area); schools, colleges, tender contractors and distributors buy it straight from the works.
Specifications
Two metal strips, one brass and one steel, each 200 x 15 mm, are joined face to face with heat-resistant rivets so they cannot slide over each other. The strip is mounted in a well-finished wooden handle, so it can be held over a flame while the curvature develops.
| Parameter | Value |
|---|---|
| SKU | LSK-PL-10342 |
| Metals | Brass and steel |
| Strip size | 200 x 15 mm |
| Joining | Heat-resistant rivets |
| Handle | Wooden |
| Heating | In a flame |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Bimetallic Strip
When heated, the brass side lengthens more than the steel side, so the strip bends with brass on the outside of the curve; on cooling it straightens again. This single demonstration introduces thermal expansion, different expansion rates and how thermostats and fire alarms switch, making it a basic piece of heat and thermodynamics lab equipment.
- Middle-school science: solids expand when heated.
- NCERT Class 11 physics, thermal properties of matter: linear expansion and different expansion coefficients.
- Applications of bimetallic strips in thermostats, flashers and fire alarms.
- Diploma and ITI electrical trades: the principle behind thermal switches.
Heating is done in an open flame, so the demonstration should be carried out by a teacher or under supervision, and the metal should be allowed to cool before it is touched.
Standard Scope of Supply
Each Bimetallic Strip comes as one item: the riveted 200 x 15 mm brass and steel strip fixed in its wooden handle. A burner or other flame source is not part of the listing and can be added to the quotation if your laboratory needs one.
Packing, MOQ and Lead Time
Strips can be quoted singly for a teacher’s demonstration or in quantity so every bench has one. The quotation you receive states packing, delivery time and price for that number, and other thermal-expansion items can be priced alongside.
Science Lab Supplies is registered with an Importer-Exporter Code, so it can ship to buyers in Ghana, Ethiopia, Tanzania, Uganda, the UAE and Saudi Arabia. Contact us through the contact page, add the strip to the enquiry cart, or read about institutional orders on the lab tender page.
Frequently Asked Questions
Which way does the Bimetallic Strip bend when heated?
Towards the steel side. Brass expands more than steel for the same rise in temperature, so the brass ends up on the outside of the curve.
How is the strip heated?
It is held by its wooden handle and heated in a flame. Carry this out under supervision and let the strip cool before touching the metal.
What size is the strip?
The brass and steel strip measures 200 x 15 mm. The two metals are joined with heat-resistant rivets and the strip is mounted in a wooden handle for holding over the flame.
Is Science Lab Supplies the manufacturer?
Yes, the strip is fabricated in the company’s own Ambala factory at Saha, and buyers receive their quotation from the manufacturer itself, not from a reseller.
Related Thermal Expansion and Conduction Apparatus
These four Physics Lab items sit naturally beside the strip in a heat lesson: two more expansion demonstrations, one with a ball and ring and one showing the force of contraction, plus two sets comparing how well different metals conduct heat.
- Ball and Ring Apparatus — brass ball and ring for expansion of solids.
- Bar Breaking Apparatus — cast iron frame and iron bar with breaking bar.
- Conductometer, For Thermal Conductivity — five metal rods on a brass hub.
- Conductivity Ring — copper, brass, steel and aluminium strips on a ring.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
