Watch Glass
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Product Code : SCL-CLE-12359
Engineered for multi-functional laboratory utility, the StemAids Watch Glass serves as a high-clarity vessel for micro-evaporative analysis and secure sample weighing. Manufactured to ISO 3585 standards using Borosilicate 3.3 glass, these concave discs provide critical chemical resistance and thermal stability for University and Vocational chemistry curricula, functioning as ruggedized covers for standard-bore laboratory beakers.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Material Grade |
Borosilicate Glass 3.3 (Expansion Coefficient 3.3) |
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Edge Finish |
Precision Fire-Polished for mechanical stress reduction |
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Surface Geometry |
Precision-Molded Concave for uniform liquid distribution |
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Quantity per Unit |
12 Discs per Industrial Pack |
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Available Diameters |
50mm, 65mm, 75mm, 100mm, 150mm |
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Chemical Durability |
High Resistance to Acidic and Alkaline Reagents |
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ISO Compliance Code |
ISO 3585 (Laboratory Glassware) |
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HS Code |
7017.90 |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
Feature: Fire-Polished Perimeter Outcome: Minimizes mechanical stress and fracture risk during handling, enabling the safe "Application" of thermal heating in evaporative experiments.
Feature: Borosilicate 3.3 Inertness Outcome: Prevents ionic leaching and sample contamination during micro-crystallization, supporting high-purity "Analysis" in Chemical Synthesis modules.
Feature: Optical Clarity and Concavity Outcome: Maximizes surface area for atmospheric liquid evaporation, facilitating student "Evaluation" of phase change rates and residue observation.
Feature: Precision Fitting for Beaker Coverage Outcome: Encourages the "Creation" of controlled environments for volatile substances, teaching vapor containment and safety protocols.
International Logistics & Compliance
StemAids maintains global supply chain readiness with infrastructure designed for seamless cross-border fulfillment:
Packaging: Export-grade seaworthy crating (ISPM-15 compliant) utilizes shock-absorbent internal modular partitioning to eliminate transit-related breakage.
Documentation: Consignments include Manufacturer’s Authorization Form (MAF), IQ/OQ/PQ Certification (on request), and User Manuals in English.
Durability: Tropicalized design tested for sustained operational performance in demanding climates (up to 45°C/90% Humidity), ensuring no degradation of glass clarity or structural integrity.
Direct OEM Sourcing Advantages
Procurement via the StemAids vertical manufacturing channel provides institutional stakeholders with definitive factory-direct authority:
In-house Precision Calibration: Every batch is inspected for dimensional consistency and edge-smoothness to ensure laboratory safety.
Batch-Tested for Uniform Reliability: Manufacturing protocols include thermal shock testing to verify resistance to rapid temperature fluctuations.
Direct Factory Spares Availability: Guaranteed long-term availability of specific diameters for institutional replenishment.
Manufacturing Control: Direct oversight of the annealing process ensures a low-strain glass matrix, superior to standard commercial-grade alternatives.
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