Four Way Plug Key
Product Code : SCL-PLE-11806
The StemAids 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. Manufactured to ISO 9001:2015 standards, it is an essential tool for Secondary and University-level physics experiments involving the comparison of EMFs, resistances, or capacities.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Switch Type |
Multi-point Plug Commutator / Selector Switch |
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Base Construction |
High-impact, insulated polymer or polished seasoned hardwood |
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Block Material |
Heavy-duty, high-conductivity brass blocks with precision bores |
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Plug Interface |
Precision-ground tapered brass plugs with insulated molded heads |
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Configuration |
Four-gap design (cross or linear) for independent or shared control |
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Interface Hardware |
4mm safety-shrouded sockets or heavy-duty brass binding posts |
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Current Rating |
Optimized for laboratory DC circuits (typically up to 5A) |
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ISO Compliance Code |
Manufactured under ISO 9001:2015 Quality Management Systems |
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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
StemAids 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 StemAids 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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