Reversing Key |Commutator
Product Code : SCL-PLE-11805
The StemAids Reversing Key, also known as a Pohl’s Commutator or 4-way switch, is a precision electrical instrument engineered for the empirical study of magnetic fields and DC circuit dynamics. This apparatus allows for the instantaneous reversal of current direction in a connected circuit without disconnecting the leads. Manufactured to ISO 9001:2015 standards, it is an essential component for Secondary and University-level physics laboratories performing Tangent Galvanometer experiments and induction studies.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Switch Type |
Double-Pole Double-Throw (DPDT) Commutator |
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Base Construction |
High-impact, insulated polymer or polished seasoned hardwood |
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Contact Material |
Heavy-duty brass strips and bridge links |
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Interface Hardware |
Four 4mm safety-shrouded sockets or heavy-duty brass binding posts |
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Operating Mechanism |
Hand-operated rocker or plug-type system for polarity reversal |
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Internal Wiring |
Pre-configured cross-linkages for instant current inversion |
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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)
- Polarity Interface: Facilitates student visualization of how current direction influences magnetic flux orientation, supporting Electromagnetism Module 101.
- Magnetic Component Quantification: Enables the physical study of Earth’s magnetism; learners apply the reversing key to a Tangent Galvanometer circuit to take readings in both directions, thereby eliminating errors due to the magnetic meridian.
- Vector Analysis: Supports the analysis of magnetic deflection; students use the commutator to verify that the deflection angle (θ) is symmetrical when the current is reversed.
- Systematic Error Evaluation: Allows students to evaluate and mitigate the effects of magnetic bias and instrumental asymmetry, fostering rigorous experimental habits.
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 contact surfaces from oxidation during maritime transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a technical guide for integration into electromagnetic measurement loops.
- Durability: Tropicalized design featuring anti-tarnish coatings and high-insulation bases, ensuring consistent electrical performance in high-humidity laboratory environments.
Direct OEM Sourcing Advantages
Procuring the StemAids Reversing Key directly ensures vertical manufacturing control:
- Low-Resistance Contact Calibration: Every key is batch-tested for contact resistance uniformity across all four quadrants, ensuring that the current magnitude does not change when the direction is flipped.
- Precision Mechanical Alignment: Direct oversight of the brass bridge assembly ensures a "no-click" smooth transition, preventing momentary open-circuits that could damage sensitive galvanometers.
- Direct Factory Spares Availability: Guaranteed availability of replacement brass plugs, rocker arms, and terminal binding posts to maximize the long-term ROI of laboratory furniture.
- Manufacturing Control: Direct oversight of the base insulation ensures zero leakage current, which is critical for high-precision null-point measurements and sensitive magnetic experiments.
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