Resistance Coil Unit
Product Code : SCL-PLE-11790
The StemAids Resistance Coil Unit is an integrated electrical workstation engineered for the empirical study of Kirchhoff’s Laws and the verification of series and parallel resistance configurations. Unlike individual coils, this unit houses multiple precision-wound resistors within a single chassis, allowing students to toggle between values rapidly. Manufactured to ISO 9001:2015 standards, it provides a stable and centralized reference for quantifying current-voltage relationships within institutional physics and electronics laboratories.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Resistive Elements |
Multiple non-inductively wound Constantan or Manganin coils |
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Value Configuration |
Typically 5 to 10 distinct values (e.g., 1,2,5,10,20,50,100Ω) |
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Accuracy / Tolerance |
±1% to ±2% across all internal units |
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Chassis Construction |
High-impact, flame-retardant polymer or seasoned wooden housing |
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Interface Hardware |
4mm safety-shrouded sockets or heavy-duty brass binding posts |
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Switching Interface |
Plugs or rotary selectors with ultra-low contact resistance |
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Power Rating |
Designed for standard laboratory DC power supplies (1–5W per coil) |
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ISO Compliance Code |
Manufactured under ISO 9001:2015 Quality Management Systems |
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HS Code |
8533.29.00 (Other fixed electrical resistors) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Integrated Circuit Interface: Facilitates student visualization of complex networks, supporting the construction of bridge circuits and voltage dividers without a cluttered workspace.
- Network Quantification: Enables the physical study of equivalent resistance, allowing learners to apply formulas for series (Rtotal=ΣRn) and parallel (1/Rtotal=Σ1/Rn) combinations by bridging adjacent terminals.
- Circuit Analysis: Supports the analysis of the "Null-Point" method; the unit acts as the "Known Resistance" arm in Wheatstone Bridge or Potentiometer experiments to identify unknown values.
- Tolerance Evaluation: Allows students to evaluate the impact of cumulative tolerance errors when multiple coils are used in a single diagnostic loop.
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 internal bifilar windings from oxidation during transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a factory-verified resistance chart for each terminal pair.
- Durability: Tropicalized design featuring anti-tarnish coating on all brass contact points, ensuring consistent electrical continuity in high-humidity laboratory climates.
Direct OEM Sourcing Advantages
Procuring the StemAids Resistance Coil Unit directly ensures vertical manufacturing control:
- In-House Bifilar Winding: Every coil within the unit is wound using the non-inductive bifilar method, ensuring accuracy for both DC and low-frequency AC experiments.
- Low-Resistance Internal Bus: Direct oversight of the internal wiring ensures that the "zero-resistance" of the internal busbars is minimized, reducing systematic errors in student data.
- Direct Factory Spares Availability: Guaranteed availability of replacement shorting plugs, safety leads, and individual internal coil modules to maximize long-term laboratory ROI.
- Manufacturing Control: Direct oversight of the marking process ensures high-contrast, permanent labeling of resistance values that will not wear off after years of frequent use.
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