Resistance Box 500 Ohms
Product Code : SCL-PLE-11720
The StemAids Resistance Box (500 Ohms) is a precision-calibrated laboratory standard engineered for the empirical study of DC circuits and bridge balancing. Optimized for Secondary, Vocational (TVET), and University-level physics, this apparatus facilitates the quantification of unknown resistance and the verification of Kirchhoff’s laws. Manufactured to ISO 9001:2015 standards, it provides a ruggedized, low-inductance solution for institutional laboratories requiring stable, discrete increments of impedance.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Total Resistance Range |
1 Ohm to 500 Ohms (Cumulative) |
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Resistor Type |
Non-inductively wound Constantan or Manganin wire coils |
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Accuracy Class |
±0.1% to ±1% (Subject to specific calibration lot) |
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Power Rating |
Designed for low-power bridge and potentiometer applications |
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Interface Hardware |
Heavy-duty brass blocks with precision-ground taper plugs |
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Chassis Construction |
Seasoned hardwood or high-impact polymer enclosure |
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Connection Terminals |
4mm safety shrouded or standard brass binding posts |
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ISO Compliance Code |
Manufactured under ISO 9001:2015 Quality Management Systems |
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HS Code |
9033.00.00 (Parts and accessories for machines/appliances) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Discrete Impedance Interface: Facilitates student visualization of series-connected resistors, supporting DC Network Theory Module 101.
- Variable Ohmic Quantification: Enables the physical study of electrical opposition, allowing learners to apply specific resistance values to achieve null-points in bridge circuits.
- Non-Inductive Coil Analysis: Supports the analysis of pure resistive behavior by utilizing bifilar winding techniques to cancel parasitic inductance.
- Contact Resistance Evaluation: Allows students to evaluate the importance of clean mechanical interfaces (tapered plugs) in maintaining measurement precision.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant) featuring moisture-barrier lining to prevent the oxidation of brass components during maritime transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and individual batch-calibration data in English.
- Durability: Tropicalized design featuring specialized insulation coatings on wire coils, tested for stability in high-humidity laboratory environments (up to 90% RH).
Direct OEM Sourcing Advantages
Procuring the StemAids Resistance Box (500 Ohms) directly ensures vertical manufacturing control:
- In-House Precision Calibration: Every resistor coil is batch-tested against master standards to ensure minimal deviation from nominal values.
- Batch-Tested for Uniform Reliability: Every wooden housing undergoes a controlled seasoning process to ensure the brass blocks remain dimensionally stable and aligned.
- Direct Factory Spares Availability: Guaranteed availability of replacement tapered plugs and terminal nuts to maintain complete laboratory sets.
- Manufacturing Control: Direct oversight of the wire-winding process ensures low temperature-coefficient performance, providing consistent data across varying ambient laboratory temperatures.
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