Potentiometer with Pencil Jockey Manufacturer,Supplier and Exporter in India
Product Code : EL-SI-8111
Jlab Export is a leading Potentiometer with Pencil Jockey Manufacturer,and suppliers in India
Potentiometer with Pencil Jockey (code EL-SI-8111) is a four-wire slide-wire potentiometer for comparing emfs and measuring small potential differences in school and college physics labs. Four 24 SWG constantan wires, each one metre long, are clamped under heavy brass strips so that end errors are negligible and a worn wire is easy to replace, and the set comes with a pencil jockey, connecting lead and a detailed working manual. It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Wires | Four constantan wires, 24 SWG, each one metre long |
| Wire clamping | Heavy brass strips of SWG 18, fixed by screws; wires easily replaceable, with negligible end errors |
| Scales | Wires stretched along two full metre scales |
| Terminals | Heavy lock-type brass terminal on each block |
| Base | 18 mm thick ply wooden board with mica on top |
| Overall size | 1.12 m x 100 mm x 50 mm high, including terminals |
| Supplied with | Pencil jockey, lead for connections and a detailed working manual |
| Versions | 4-wire (this model) and 10-wire, both with pencil jockey |
| Quality check | Each potentiometer is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-SI-8111 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How Does It Compare with Other JLab Potentiometers?
| Model | Wires | Jockey | Other listed details |
|---|---|---|---|
| This potentiometer (EL-SI-8111) | Four 24 SWG constantan wires, one metre each; 10-wire version available | Pencil jockey | Two full metre scales; 18 mm ply board with mica top; lead and working manual supplied |
| Potentiometer with Spring Type Press Jockey | 4-wire or 10-wire model | Spring-type brass sliding press jockey running on a metal rod | Perspex pointer for reading a raised scale |
| Potentiometer Single wire | One 0.56 mm constantan wire | Pencil jockey | Metre scale in millimetres and centimetres; plated brass end plates on a laminated board |
Choose this model for standard multi-wire potentiometer practicals with a hand-held jockey. The press-jockey model guides the contact along a rod, which suits labs that want smooth jockey movement and a pointer for reading the scale, while the single-wire potentiometer is the simplest option for introductory work.
What Is the Potentiometer Used For?
When a steady current flows through a uniform wire, the potential drop along it is proportional to the length, so a potentiometer measures a voltage as a balance length. Because no current is drawn from the cell under test at balance, it measures the true emf rather than the terminal voltage, which a voltmeter cannot do. In class 12 physics practicals the instrument is used to compare the emfs of two primary cells and to find the internal resistance of a cell; in college labs it also measures small potential differences such as thermocouple emfs and checks voltmeters and ammeters. In a multi-wire potentiometer the wires are joined end to end through the brass strips, so the balance point can be read over several metres of wire.
A driver battery or power supply, a rheostat, a key and a galvanometer complete the circuit; they are separate items. Touch the pencil jockey lightly on the wire and lift it before moving — dragging or pressing hard scrapes the constantan and spoils its uniformity. If a wire does get worn or kinked, loosen the screws of the brass strips and fit a new length.
What to Specify When Ordering
- Version — the 4-wire model on this page or the 10-wire model.
- Quantity — the minimum order is 10 units.
- Spare jockeys — add spare pencil jockeys if several students share each bench.
- Circuit items — galvanometer, rheostat, cells or a standard cell for the same practicals can go in one enquiry.
Frequently Asked Questions
How many wires does it have, and of what wire?
Four constantan wires of 24 SWG, each one metre long. A 10-wire version with pencil jockey is also listed.
What comes with the potentiometer?
A pencil jockey, a lead for connections and a detailed working manual. The battery, rheostat, key, galvanometer and cells for the experiment are not part of this listing.
Can the wires be replaced?
Yes. The wires are clamped under heavy brass strips fixed with screws, so a worn wire is easy to replace.
What are its dimensions?
1.12 m long, 100 mm wide and 50 mm high, including the terminals, on an 18 mm thick ply wooden board with a mica top.
Which experiments is it used for?
Comparing the emfs of two cells, finding the internal resistance of a cell, measuring small potential differences such as thermocouple emfs, and calibrating meters against a standard cell.
How does it differ from the spring-type press jockey model?
This model uses a hand-held pencil jockey; the other has a spring-type brass sliding jockey that runs on a metal rod, with a Perspex pointer for reading its raised scale.
Who manufactures this potentiometer?
Jain Laboratory Instruments Pvt Ltd (JLab) makes it at its works in Ambala, Haryana, India, and quotes for it directly.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a physics lab equipment manufacturer in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The potentiometer is built at JLab’s own works rather than bought in from a trader, so schools, colleges, dealers and importers buy factory-direct, each unit is visually inspected before dispatch, and replacement parts and repeat orders come from the manufacturer. JLab exports worldwide and ships to buyers in every region — Slovakia in Eastern Europe, Mongolia in East Asia, Congo in Central Africa, Tunisia in North Africa and Bolivia in South America, for example. Tender details are on the JLab lab tenders page.
Potentiometer Accessories and Alternatives
- Spare Pencil Jockey — a replacement contact jockey with Bakelite handle and brass-plated contact.
- Standard Cell — a stable voltage reference for standardising potentiometers.
- Spot Reflecting Galvanometer — a DC null detector for potentiometers and bridges.
- Potentiometer with Spring Type Press Jockey — the multi-wire model with a rod-guided sliding jockey.
- Potentiometer Single wire — a one-wire potentiometer on a metre scale.
- Crompton Potentiometer — a panel potentiometer for emf and potential difference measurement.
More in the Scientific Instrument range and the Indian Instruments section.
Request a Quote
Quotes come direct from the manufacturer. Use the Add To Cart enquiry button on this page, or send the version (4-wire or 10-wire), the quantity (minimum 10 units), any spare jockeys or accessories and your delivery location through the contact page.
Last updated: 8 October 2026
