Pencil Jockey
Product Code : SCL-PLE-11754
Quick Answer: The Pencil Jockey is an insulated, pencil-shaped contact probe for finding null points on meter bridges and slide-wire potentiometers. It is tapped onto the bridge wire, and its non-marring edge avoids kinking the wire.
Last updated: 18 October 2026
Key Features
- Pencil-style point for precise positioning on the wire.
- Insulated body with a contoured grip for a steady vertical tap.
- Terminal for connecting the galvanometer lead.
- Non-marring contact edge protects the resistance wire.
Technical Specifications
| Specification | Value |
|---|---|
| Body | Insulated, contoured grip |
| Contact | Pencil-type point, non-marring edge |
| Lead connection | Terminal for lead |
| Use | Meter bridges and slide-wire potentiometers |
How It Is Used
The galvanometer lead is connected to the jockey, which is then touched briefly onto the bridge wire at different points until the galvanometer shows no deflection. The balance point is read from the scale and used to calculate an unknown resistance or EMF. Tapping, rather than dragging, keeps the wire free from kinks.
Frequently Asked Questions
Where is the Pencil Jockey used?
On meter bridges and slide-wire potentiometers, to locate the null point when measuring an unknown resistance or EMF.
Related Physics Lab Equipment
See the full physics lab equipment range, or these related meter bridge and potentiometer items:
- Jockey 100mm with insulated handle
- Wheatstone Bridge Apparatus
- Potentiometer Apparatus
- Potentiometer, 1metre, Single Wire
- Galvanometer
Institutions and distributors in Egypt, Cabo Verde, Qatar, Kuwait and Turkmenistan can request an export quotation for the Pencil Jockey.
For a quotation on the Pencil Jockey, contact JLab India on +91-8569909696.
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