Wheatstone Bridge Apparatus
Product Code : SCL-PLE-11784
The StemAids Wheatstone Bridge (Meter Bridge) is a high-accuracy electrical workstation engineered for the empirical study of Kirchhoff’s Laws and the quantification of unknown resistances. Optimized for Secondary and University-level physics, this apparatus utilizes a one-meter constantan or manganin wire to facilitate the "Null-Point" method of measurement. Manufactured to ISO 9001:2015 standards, it provides a stable and reliable platform for verifying the laws of series and parallel resistance within institutional laboratory environments.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Base Construction |
Polished seasoned hardwood (approx. 110cm length) with non-slip feet |
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Bridge Wire |
1-meter long Constantan or Manganin (G-24/26) for low temperature coefficient |
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Scale |
Integrated 100cm/ 1000mm boxwood or stainless steel scale |
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Contact Blocks |
Heavy-duty, thick-gauge brass strips with 4mm socket/screw terminals |
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Contact Interface |
Includes a sliding Jockey with a spring-loaded "knife-edge" contact |
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Gap Configuration |
Two-gap or three-gap designs for comparison of resistances |
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ISO Compliance Code |
Manufactured under ISO 9001:2015 Quality Management Systems |
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HS Code |
9023.00.00 (Educational/demonstrational scientific apparatus) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Balanced Bridge Interface: Facilitates student visualization of the Wheatstone condition (P/Q=R/S), supporting Electromagnetism Module 101 by demonstrating zero current flow in the galvanometer at the balance point.
- Resistance Quantification: Enables the physical study of electrical resistivity, allowing learners to apply the formula X=R×l(100−l) to find the resistance of an unknown wire.
- Series-Parallel Analysis: Supports the analysis of complex circuits; students can evaluate the equivalent resistance of combinations by physically swapping components in the bridge gaps.
- Sensitivity Evaluation: Allows students to evaluate how the choice of standard resistance affects the "null-point" position and the overall precision of the measurement.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant) featuring rigid longitudinal bracing to ensure the wooden base does not warp and the bridge wire remains under consistent tension during transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a detailed Experiment Guide for resistivity measurements.
- Durability: Tropicalized design featuring anti-oxidation coatings on brass strips and vacuum-seasoned wood to prevent structural deformation in high-humidity climates.
Direct OEM Sourcing Advantages
Procuring the StemAids Wheatstone Bridge directly ensures vertical manufacturing control:
- In-House Wire Calibration: The bridge wire is batch-tested for uniform diameter and resistance per unit length, which is critical for the linearity of the 100cm
- Precision Terminal Alignment: Direct oversight of the brass strip mounting ensures minimal "End Error," providing students with high-fidelity data for their calculations.
- Direct Factory Spares Availability: Guaranteed availability of replacement jockeys, constantan wires, and high-quality plug-type resistance boxes to maximize long-term laboratory ROI.
- Manufacturing Control: Direct oversight of the scale engraving ensures absolute alignment between the zero-mark and the wire start-point, reducing systematic measurement errors.
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