Burette with Rota Stopcock – 50ml
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Product Code : SCL-CLE-12389
The StemAids 50ml Burette is a precision volumetric instrument engineered for definitive liquid dispensing in University, Vocational, and Research laboratories. Constructed from Borosilicate 3.3 glass and compliant with ISO 385 standards, it features a screw-thread PTFE Rota-stopcock for needle-point flow control. It is optimized for complex acid-base titrations requiring superior chemical durability and linear graduation accuracy.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Material Grade |
Low-expansion Borosilicate 3.3 Glass |
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Capacity |
50ml |
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Stopcock Type |
Rota-flow / Screw-thread PTFE (Grease-free) |
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Calibration Standard |
Calibrated to Deliver (Ex) at 20°C |
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Accuracy Class |
Class AS / Class B Alignment |
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Graduation Type |
Permanent high-contrast ceramic enamel |
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Chemical Durability |
Class 1 Hydrolytic Resistance (ISO 719) |
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ISO Compliance Code |
ISO 385 (Laboratory glassware — Burettes) |
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HS Code |
7017.90 (Laboratory Glassware) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
Feature: PTFE Rota-Stopcock Mechanism Outcome: Facilitates student "Application" of drop-wise titration techniques, allowing for the precise determination of equivalence points in complex volumetric analyses.
Feature: Permanent High-Contrast Graduations Outcome: Supports the "Evaluation" of meniscus alignment and volume displacement, critical for the reduction of parallax and subjective measurement error.
Feature: Precision-Ground Delivery Tip Outcome: Enables student "Analysis" of drainage constants and flow rates, ensuring mastery of standardized analytical laboratory protocols.
Feature: Chemically Inert Borosilicate 3.3 Matrix Outcome: Promotes "Understanding" of reagent integrity by eliminating ion-leaching variables during the handling of strong acids and alkalis.
International Logistics & Compliance
StemAids operates a specialized export framework to ensure the metrological and structural integrity of precision glassware throughout the global supply chain:
Packaging: Export-grade seaworthy crating (ISPM-15 compliant) utilizing internal high-density longitudinal supports to protect the elongated glass shafts from vibrational stress and fracture.
Documentation: Includes Manufacturer’s Authorization Form (MAF), batch-specific Certificate of Conformity, and technical User Manuals in English.
Durability: Tropicalized design tested for operation in demanding climates (up to 45°C/90% Humidity), ensuring graduation markings remain chemically resistant and legible under intensive use.
Direct OEM Sourcing Advantages
Procurement via the StemAids vertical manufacturing channel provides institutional stakeholders with definitive factory-direct authority and technical assurance:
In-house Precision Calibration: Every burette undergoes rigorous gravimetric verification to ensure strict adherence to ISO 385 volumetric tolerances.
Vertical Quality Integration: Total oversight of the glass-forming and annealing cycles results in a low-strain glass matrix, significantly increasing the mechanical lifecycle of the instrument.
Batch-Tested for Uniform Reliability: Every production run is subjected to thermal-shock and pressure-resistance tests to meet the definitive standards required for international tenders.
Direct Factory Spares Availability: Guaranteed long-term availability of specific PTFE Rota-stopcock assemblies and replacement tips to prevent laboratory downtime and ensure asset continuity.
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