Four Way Plug Key
Product Code : SCL-PLE-11806
The JLab India Four-Way Plug Key is a specialized laboratory switch engineered for the empirical study of complex circuit networks and the comparison of electrical components. Featuring four independent brass blocks and precision-ground plugs, this apparatus allows students to selectively open or close multiple circuit branches from a single central hub. It is an essential tool for Secondary and University-level physics experiments involving the comparison of EMFs, resistances, or capacities.
Technical Specifications
| Tender Specification | OEM Technical Detail |
| Switch Type | Multi-point Plug Commutator / Selector Switch |
| Base Construction | High-impact, insulated polymer or polished seasoned hardwood |
| Block Material | Heavy-duty, high-conductivity brass blocks with precision bores |
| Plug Interface | Precision-ground tapered brass plugs with insulated molded heads |
| Configuration | Four-gap design (cross or linear) for independent or shared control |
| Interface Hardware | 4mm safety-shrouded sockets or heavy-duty brass binding posts |
| Current Rating | Optimized for laboratory DC circuits (typically up to 5A) |
Certification | ISO certificates available on request |
| HS Code | 8536.50.00 (Electrical switches for educational use) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Network Interface: Facilitates student understanding of complex circuit topology, supporting the study of Kirchhoff’s Laws and parallel branch management.
- EMF Comparison Quantification: Enables the physical study of cell dynamics; learners apply the 4-way key to switch between two different primary cells (e.g., Daniel and Leclanché) in a potentiometer circuit without swapping wires.
- Component Analysis: Supports the analysis of "known vs. Unknown" variables; by using different gaps, students can quickly toggle between a standard resistor and an unknown coil to observe galvanometer deflection.
- Operational Evaluation: Allows students to evaluate the impact of contact resistance across multiple points; the tapered plug design teaches the importance of physical contact area in maintaining circuit integrity.
International Logistics & Compliance
JLab India ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant) featuring vacuum-sealed moisture barriers to prevent the brass blocks and plugs from tarnishing during maritime transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a guide for common wiring configurations in bridge circuits.
- Durability: Tropicalized design featuring anti-tarnish coatings and vacuum-seasoned bases to prevent warping and ensure perfect plug alignment in high-humidity climates.
Direct OEM Sourcing Advantages
Procuring the JLab India Four-Way Plug Key directly ensures vertical manufacturing control:
- Precision Taper Grinding: Every plug is individually ground to fit its corresponding brass block with a high surface-area contact, resulting in ultra-low "Zero Resistance" across the gap.
- High-Insulation Integrity: Direct oversight of the base manufacturing ensures zero leakage current between the four blocks, which is critical for high-sensitivity null-point measurements.
- Direct Factory Spares Availability: Guaranteed availability of replacement tapered plugs and terminal binding posts to maximize the long-term ROI of laboratory inventory.
- Manufacturing Control: Direct oversight of the assembly ensures that the gaps are uniform and the blocks are perfectly parallel, preventing mechanical stress on the plugs during frequent use.
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