Rheostat 12 Inches
Product Code : SCL-PLE-11800
The StemAids 12-Inch Sliding Rheostat is a standard laboratory-grade variable resistor engineered for the empirical study of current regulation and voltage division. This 12-inch (approx. 300mm) model provides an optimal balance between high resolution (length of travel) and compact footprint, making it the most versatile choice for Secondary and University-level physics workstations. Manufactured to ISO 9001:2015 standards, it facilitates the quantification of Ohm's Law and circuit characteristics within institutional environments.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Tube Length |
12 Inches (300mm) nominal |
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Resistive Element |
Oxidized Constantan (Eureka) wire wound on an insulating core |
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Core Material |
High-temperature vitrified ceramic tube |
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Standard Ratings |
Available in various Ω/A ratios (e.g., 10Ω/5A,42Ω/2A,100Ω/1.5A) |
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Slider Mechanism |
Low-friction phosphor-bronze contact brush with insulated handle |
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Terminals |
Three 4mm safety-shrouded or heavy-duty brass terminals |
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Frame |
Sturdy metallic end-supports with anti-slip mounting |
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Functionality |
Dual-use: Variable Resistor (2 terminals) or Potential Divider (3 terminals) |
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ISO Compliance Code |
Manufactured under ISO 9001:2015 Quality Management Systems |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Current Modulation Interface: Facilitates student visualization of how increasing the length of a conductor increases its resistance (R∝L), supporting Electromagnetism Module 101.
- Variable Quantification: Enables the physical study of circuit dynamics, allowing learners to apply the rheostat to control the brightness of a bulb or the speed of a small DC motor.
- Potential Division Analysis: Supports the analysis of voltage sharing; by using all three terminals, students can create a continuously variable output voltage from a fixed input source.
- Thermal Evaluation: Allows students to evaluate the power-handling limits of components by monitoring the heat dissipated by the wire under different current loads.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant). The ceramic tube is secured within high-density foam to prevent fracture during transit, and the slider is locked to prevent movement.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a datasheet indicating the maximum permissible current to prevent over-heating.
- Durability: Tropicalized design featuring oxidized wire (which provides natural insulation between turns) and anti-corrosion hardware for long-term stability in high-humidity climates.
Direct OEM Sourcing Advantages
Procuring the StemAids 12-Inch Rheostat directly ensures vertical manufacturing control:
- Uniform Winding Tension: Every unit is machine-wound to ensure the wire turns are perfectly adjacent but not overlapping, preventing "jumps" in resistance during adjustment.
- High-Purity Ceramic Core: Direct oversight of the ceramic firing process ensures the tube is free from air bubbles, providing superior mechanical strength and heat dissipation.
- Direct Factory Spares Availability: Guaranteed availability of replacement slider brushes, insulated knobs, and ceramic tubes to ensure a long lifecycle for laboratory assets.
- Manufacturing Control: Direct oversight of the terminal-to-wire connection ensures negligible contact resistance, providing students with accurate and repeatable data for their experiments.
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