Pencil Jockey
Product Code : SCL-PLE-11754
The JLab India Pencil Jockey is a precision contact tool engineered for the empirical determination of null points on slide-wire potentiometers and Meter Bridges. Optimized for Secondary and University-level physics, this specialized probe ensures a consistent, low-resistance electrical connection without damaging the sensitive resistive wire. It facilitates high-resolution quantification of unknown EMFs and resistances within institutional laboratory environments.
Technical Specifications
| Tender Specification | OEM Technical Detail |
| Contact Tip | High-conductivity Brass or Nickel-plated Copper |
| Body Construction | Heavy-duty, insulated high-impact polymer or seasoned hardwood |
| Contact Mechanism | Knife-edge or spring-loaded "pencil" point for precise positioning |
| Interface Hardware | 4mm safety-shrouded binding post or terminal screw for lead connection |
| Ergonomics | Contoured grip designed for steady, vertical "tap" contact |
| Protective Features | Non-marring contact edge to prevent "kinking" of the bridge wire |
Certification | ISO certificates available on request |
| HS Code | 9023.00.00 (Educational/demonstrational scientific apparatus) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Null-Point Interface: Facilitates student visualization of electrical equilibrium by allowing them to "slide and tap" along a resistive wire to find where Ig=0, supporting DC Circuit Module 201.
- Length Quantification: Enables the physical study of resistance vs. Length (R∝L), allowing learners to apply data to calculate unknown resistances using the Meter Bridge formula R=X(l1/l2).
- Contact Precision Analysis: Supports the analysis of "end-errors" and contact resistance by demonstrating the importance of a clean, vertical interface between the jockey and the wire.
- Measurement Sensitivity Evaluation: Allows students to evaluate the sensitivity of a galvanometer by observing the deflection change per millimeter of jockey movement.
International Logistics & Compliance
JLab India ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade bulk packaging featuring individual anti-scratch wrapping to protect the metallic contact tips from oxidation or blunting during transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a technical note on "Proper Jockey Handling to Minimize Wire Wear."
- Durability: Tropicalized design featuring corrosion-resistant plating and UV-stable handles, ensuring the jockey remains conductive and comfortable to use in high-humidity climates.
Direct OEM Sourcing Advantages
Procuring the JLab India Pencil Jockey directly ensures vertical manufacturing control:
- In-House Tip Polishing: Every jockey tip is precision-ground to a fine knife-edge, ensuring that the student makes contact with a single, discrete point on the wire for maximum accuracy.
- Batch-Tested for Low Resistance: Every unit is tested for internal continuity to ensure the tool itself does not introduce significant parasitic resistance into the bridge circuit.
- Direct Factory Spares Availability: Guaranteed availability of replacement terminal screws and insulated handles to maintain complete classroom sets.
- Manufacturing Control: Direct oversight of the assembly process ensures a robust mechanical bond between the contact tip and the lead terminal, preventing intermittent connections during critical experiments.
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