Ring and Ball Apparatus
Product Code : SCL-PLE-11759
The StemAids Ring and Ball Apparatus is a foundational thermodynamic demonstrator engineered for the empirical study of the thermal expansion of solids. Optimized for Primary and Secondary school physics, this apparatus provides a clear, qualitative, and quantitative visualization of how atomic vibrations increase the volume of a metallic body when heated. Manufactured to ISO 9001:2015 standards, it facilitates the demonstration of kinetic molecular theory within institutional laboratory environments.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Material Construction |
Precision-machined Brass or Chrome-plated Steel |
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Ball Diameter |
Typically 25mm (Standard Laboratory sizing) |
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Ring Geometry |
Precisely gauged to allow the ball to pass through only at room temperature |
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Handle Assembly |
Heat-resistant insulated handles or wooden grips for user safety |
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Connection Type |
Ball and ring are independently mounted on separate rods |
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Functional Principle |
Volumetric Thermal Expansion / Kinetic Theory of Matter |
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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)
- Volumetric Expansion Interface: Facilitates student visualization of how solids expand in all directions upon heating, supporting Thermodynamics Module 101.
- Kinetic Theory Application: Enables the physical study of molecular motion, allowing learners to apply the concept that heat increases the mean distance between atoms.
- Causality Analysis: Supports the analysis of "interference fits"—demonstrating why the ball, which passed freely through the ring initially, is obstructed after being held over a Bunsen flame.
- Material Science Evaluation: Allows students to evaluate the different rates of expansion by comparing the apparatus to a bimetallic strip, fostering a deeper understanding of the coefficient of thermal expansion.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant) featuring anti-scratch wrapping to protect the polished surface of the ball and the inner diameter of the ring during transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a safety protocol sheet for thermal experiments.
- Durability: Tropicalized design featuring corrosion-resistant plating and seasoned wooden handles to prevent degradation in high-humidity laboratory environments.
Direct OEM Sourcing Advantages
Procuring the StemAids Ring and Ball Apparatus directly ensures vertical manufacturing control:
- In-House Precision Gauging: Every unit is batch-tested to ensure the "Clearance Fit" at room temperature is minimal (typically <0.5mm), making the expansion effect dramatic and highly visible to students.
- Batch-Tested for Uniform Reliability: The mechanical bond between the metallic rod and the insulated handle is tested for thermal stability, ensuring the handle does not loosen or conduct heat to the user.
- Direct Factory Spares Availability: Guaranteed availability of matching replacement balls and rings to maintain complete laboratory sets.
- Manufacturing Control: Direct oversight of the polishing process ensures a smooth, non-binding interface, allowing for a clean and repeatable demonstration of thermal laws.
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