Filter Funnel
Product Code : SCL-CLE-11923
The StemAids Filter Funnel is a precision-engineered laboratory instrument designed for the efficient separation of solids from liquids and the spill-free transfer of reagents. Characterized by a 60? cone angle—optimized for a perfect fit with standard quadrant-folded filter paper—it facilitates rapid filtration under gravity. Manufactured to ISO 4798 standards, these funnels are available in various diameters to accommodate everything from micro-scale precipitates to bulk liquid handling in Chemistry and Biology laboratories.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Material |
Grade A Borosilicate Glass 3.3 (High Thermal/Chemical Resistance) |
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Cone Angle |
Precisely 60? for optimal filter paper seating |
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Stem Design |
Long or Short stem with a heavy-duty fire-polished rim |
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Stem Tip |
Beveled (angled) at 30?–45? to facilitate liquid flow |
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Diameters |
35mm,50mm,65mm,75mm,100mm,150mm |
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Thermal Resistance |
Withstands sterilization and hot filtration protocols |
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Chemical Resistance |
Inert to corrosive acids, alkalis, and organic solvents |
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ISO Compliance |
Manufactured under ISO 9001:2015 and ISO 4798 standards |
Key Pedagogical & Laboratory Outcomes
- Separation Interface: Facilitates the understanding of Gravimetric Filtration. Learners identify the process of "residue" collection on the filter medium while the "filtrate" passes into the receiving vessel.
- Fluid Dynamics Application: Enables the study of Surface Tension and Flow. Learners apply the funnel with a beveled stem against the side of a beaker to direct flow, preventing splashing and air-lock.
- Solubility Analysis: Supports the analysis of "Hot Filtration"; the Borosilicate 3.3 glass allows students to evaluate the removal of impurities from a hot saturated solution before crystallization occurs.
- Efficiency Evaluation: Allows students to evaluate the impact of stem length on filtration speed; a longer liquid column in the stem creates a slight suction (the "siphon effect"), accelerating the filtration process.
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade, high-impact packaging. Funnels are nested in custom-cut, shock-absorbent partitions to prevent the delicate stems from snapping during maritime or air transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and Material Safety Data Sheet (MSDS).
- Durability: The glass is specially annealed to remove internal stresses, ensuring the funnel rim and stem junction—the most common points of failure—remain rugged under heavy use.
Direct OEM Sourcing Advantages
Procuring StemAids Filter Funnels directly ensures vertical manufacturing control:
- Precision 60? Geometry: Direct oversight ensures the internal angle is mathematically exact, preventing the bypass of unfiltered liquid that occurs with poorly shaped "off-brand" funnels.
- Beveled Flow Tips: We ensure every stem is ground at a precise angle to promote the formation of a continuous liquid column, which is vital for maintaining filtration speed.
- Direct Factory Inventory: Guaranteed availability of specialized "Ribbed" funnels (to allow air escape) and various stem lengths for different rack configurations.
- Quality Assurance: Every batch is inspected for wall-thickness uniformity at the neck to ensure the unit does not fracture when placed in a metal funnel support.