Pencil Jockey
Product Code : LSK-EAE-11119
Pencil Jockey (SKU LSK-EAE-11119) is a pen-style contact probe with a bakelite moulded handle and a brass plated contact, pressed onto the wire of a meter bridge or potentiometer to find the balance point. It is used in Class 12 and B.Sc. physics practicals on bridges and potentiometers. Science Lab Supplies produces the jockey in its works at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and sells it to schools, colleges, tender contractors and distributors without a reseller.
Specifications
The table below lists every stated detail. In short, the jockey has a bakelite moulded handle, a brass plated contact with a locating notch, and a heavy lock-type brass plated terminal for the connecting lead, and it suits Wheatstone bridges and all types of potentiometers used in physics teaching.
| Specification | Value |
|---|---|
| SKU | LSK-EAE-11119 |
| Handle | Bakelite moulded |
| Contact | Brass plated |
| Locating notch | Provided |
| Terminal | Heavy lock-type, brass plated |
| Terminal use | Connection with a lead |
| Compatibility | Wheatstone bridge (meter bridge) and all types of potentiometers |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Pencil Jockey
The jockey makes a brief, light contact at any point along a bridge or potentiometer wire, so students can find the null deflection without disturbing the circuit. It is a small but necessary item of physics lab equipment in India for Class 12 and undergraduate practicals that rely on balance-length measurements.
- Class 12 physics: finding the balance length on a meter bridge when measuring resistance and resistivity.
- Comparing EMFs and internal resistance on a potentiometer, with the cell switched in by a Tapping Key Physics Lab and balance shown on a centre-zero Galvanometer.
- Spare jockeys for existing bridges and potentiometers in a practical lab.
Touch the jockey on the wire gently and lift it before moving it; dragging it under pressure scrapes the wire and changes its resistance per unit length.
Standard Scope of Supply
One pencil jockey is supplied, with its bakelite moulded handle, brass plated contact with locating notch and lock-type brass plated terminal. A connecting lead can be added to the quotation if needed, together with any bridge, potentiometer or galvanometer for the same experiment.
Packing, MOQ and Lead Time
Jockeys can be quoted singly as spares or in a quantity for every bridge and potentiometer in a laboratory. Science Lab Supplies lists packing, delivery time and price for that quantity on the quotation, and bridges, potentiometers or galvanometers can be placed on the same quote.
Holding an Importer-Exporter Code, Science Lab Supplies is able to ship to buyers in the Philippines, Nepal, Bangladesh, Zambia, Rwanda and South Africa. Ask for prices on the contact page, build a list in the enquiry cart, or refer to the lab tender page for tender orders.
Frequently Asked Questions
Which instruments does the pencil jockey fit?
It is designed for the Wheatstone bridge (meter bridge) and all types of potentiometers. The lead connects at its lock-type brass plated terminal, and the brass plated contact touches the bridge or potentiometer wire.
How is the lead connected?
A heavy lock-type brass plated terminal on the jockey holds the connecting lead. Tighten the terminal on the bare end of the lead so the connection stays firm while the jockey is moved along the wire.
How does it compare with the Pencil Jockey for lab?
The Pencil Jockey for lab has an insulated plastic or ebonite handle, a plated brass knife-edge tip and a 4 mm safety socket. This model has a bakelite moulded handle, a brass plated contact with a locating notch and a lock-type terminal.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer. Its factory in Saha, Ambala, India produces the pencil jockey, and quotations reach you directly from the factory rather than through an agent.
Related Bridges, Potentiometers and Keys
A jockey is only one part of a balance-point experiment. These bridges, potentiometers, kits and resistance standards make up the rest of the circuit in a physics practical lab, and any of them can be listed with spare jockeys on a single quotation.
- Meter Bridge or Wheatstone Bridge With Pencil Jockey — four-gap bridge with 24 SWG constantan wire.
- Potentiometer with Jockey Pencil — wooden base, brass blocks, 4 mm sockets and a 100 cm scale.
- Portable Wheatstone Bridge Apparatus Circuit Board — ratio arms from x0.01 to x1000, with 4 mm sockets.
- Winston Bridge Kit — digital meters, a battery holder and a 5 A, 10 Ω rheostat.
- Potentiometer Kit — Daniel cell, rheostat, 30-0-30 galvanometer and resistance boxes.
- Post Office Box Plug Type — 3-ratio and 4-ratio versions with two spring keys.
- Resistance Box Plug Type (Constantan / Manganin Coil) — constantan or manganin coil versions.
Browse the full Electrical and Electronics range, the Lab Meters range for galvanometers, or all physics lab equipment.
Last updated: 9 October 2026
 (1).png)
.jpg)
.jpg)
 (1).png)
 (1).png)
.jpg)