Two Way Plug Key
Product Code : SCL-PLE-11807
The StemAids Two-Way Plug Key is a precision-engineered laboratory switch designed for the empirical study of circuit selection and the comparison of electrical components. Featuring three heavy-duty brass blocks and two precision-ground tapered plugs, this apparatus allows students to connect a common terminal to either of two independent circuit branches. Manufactured to ISO 9001:2015 standards, it is an essential tool for Secondary and University-level physics experiments, particularly in comparing the EMF of two cells or switching between known and unknown resistances.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Switch Type |
Single-Pole Double-Throw (SPDT) Plug Selector |
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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 |
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Plug Interface |
Precision-ground tapered brass plugs with insulated molded heads |
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Configuration |
Three-block, two-gap design for dual-path routing |
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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)
- Dual-Path Interface: Facilitates student understanding of branch switching and common-rail circuit design, supporting the study of complex network theorems.
- EMF Comparison Quantification: Enables the physical study of cell dynamics; learners apply the 2-way key in a potentiometer circuit to alternate between a standard cell and a test cell instantly.
- Selection Analysis: Supports the analysis of circuit behavior; students use the key to compare the effects of different components (e.g., two different resistors) on galvanometer deflection without re-wiring.
- Contact Integrity Evaluation: Allows students to evaluate the impact of contact resistance; the tapered design ensures a "zero-leakage" connection when firmly seated, teaching high standards for experimental data collection.
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 protect the brass surfaces from oxidation during maritime transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a technical datasheet for standard circuit configurations.
- Durability: Tropicalized design featuring anti-tarnish coatings and vacuum-seasoned bases to prevent warping, ensuring the plugs fit perfectly even in high-humidity laboratory climates.
Direct OEM Sourcing Advantages
Procuring the StemAids Two-Way Plug Key directly ensures vertical manufacturing control:
- Precision Taper Grinding: Every plug is individually matched to its brass block bore to ensure maximum surface contact, resulting in ultra-low "Zero Resistance" (typically <02Ω).
- High-Insulation Integrity: Direct oversight of the base manufacturing ensures zero leakage current between the blocks, which is critical for sensitive 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 furniture.
- 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 classroom use.
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