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Wheatstone Bridge Apparatus
Wheatstone Bridge Apparatus (Product Code: SCL-339/068) is a slide-wire bridge used to find an unknown resistance by balancing it against a known one in school and college physics laboratories. It has nine heavy lock-type brass terminals, removable copper binding pieces across the end gaps and a pencil jockey, so it forms a Wheatstone bridge experiment kit once a galvanometer, cell and resistance box are added. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Terminals | Nine heavy brass lock-type terminals, fitted to keep connection resistance to a minimum |
| End gaps | Closed by removable copper binding pieces held in position by the terminals |
| Bridge wire | Constantan wire stretched along the top of a wooden metre scale |
| Wire clamping | Securely clamped to brass end strips so that end errors are negligible |
| Jockey | Pencil jockey included |
| Base | Laminated base |
| Product code | SCL-339/068 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Wheatstone Bridge Used For?
The bridge compares an unknown resistance with a known value taken from a resistance box. A cell drives current through the wire, a galvanometer is connected between the junction of the two resistances and the jockey, and the jockey is moved along the wire until the galvanometer shows no deflection; at that null point, the ratio of the two wire lengths equals the ratio of the resistances.
Students also use it to find the resistivity of a wire's material and to check the laws of resistances in series and parallel. Tighten each lock-type terminal fully, press the pencil jockey lightly rather than dragging it along the wire, and choose a known resistance that brings the balance point near the middle of the scale for the best precision.
OEM Manufacturer
The Wheatstone Bridge Apparatus is an original ScienceLab product: Jain Scientific Equipments Private Limited, the company behind the ScienceLab name, is its OEM and builds it at its own licensed factory at Saha, Ambala, Haryana, India. Colleges, schools, dealers and importers are quoted directly by the manufacturer, not through a trader. If a copper binding piece or the jockey goes missing, ask us about replacements. The company profile explains more about the business.
Related Physics Lab Equipment
A complete bridge circuit needs a null detector, a known resistance, a cell and a key. Items that complete the set-up:
- Resistance Box — supplies the known resistance arm.
- Moving Coil Galvanometer — centre-zero null detector for finding the balance point.
- Leclanche Cell — a cell to drive current through the bridge wire.
- One Way Key — switches the cell circuit on only while readings are taken.
- Wheatstone Bridge Four Gap — an alternative bridge model.
Find more electricity practical apparatus in the Physics Lab category.
Frequently Asked Questions
What is the Wheatstone Bridge Apparatus used to measure?
The Wheatstone Bridge Apparatus is used to measure an unknown resistance by comparing it with a known resistance at the null point of a galvanometer. The same set-up is used to find the resistivity of a wire and to verify series and parallel combinations of resistances.
How does the Wheatstone Bridge Apparatus keep end errors small?
On the Wheatstone Bridge Apparatus, the wire runs along the top of a wooden metre scale and is securely clamped to brass end strips, so end errors are negligible. The nine lock-type brass terminals also keep connection resistance to a minimum.
What accessories are needed with the Wheatstone bridge?
The Wheatstone Bridge Apparatus comes with a pencil jockey. To perform the experiment you also need a galvanometer, a cell, a plug key, a resistance box and connecting leads, all of which ScienceLab can include in the same quotation on request.
Who manufactures the Wheatstone Bridge Apparatus?
The Wheatstone Bridge Apparatus is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), which is the OEM and produces it at its own licensed factory in Saha, Ambala, Haryana, India. Buyers deal with the manufacturer directly for quotations and replacement parts.
How should the bridge wire be looked after?
Keep the wire of the Wheatstone Bridge Apparatus clean and straight, and press the pencil jockey lightly at each test point instead of sliding it under pressure. Scraping thins the wire locally, which changes its resistance per unit length and spoils balance-point readings.
Can the Wheatstone Bridge Apparatus be ordered in bulk?
Yes. The Wheatstone Bridge Apparatus can be quoted in lab-set quantities for schools, colleges, dealers and importers across India and international markets. Send the number of units and any accessories through the contact page, and the quotation will come directly from the manufacturer in Ambala.
Request a Quote
Get a quotation for the Wheatstone Bridge Apparatus by writing to us on the contact page or adding it to the enquiry cart along with the accessories you need. Pricing comes straight from the manufacturer.
Last updated: 24 September 2026
