Stalagmometer
Product Code : SCL-CLE-11909
The StemAids Stalagmometer (Traube's design) is a precision-engineered glass instrument used to determine the surface tension of various liquids through the "Drop-Weight Method." By counting the number of drops formed by a specific volume of liquid as it flows through a calibrated capillary, students can calculate surface tension relative to a reference liquid (usually distilled water). Manufactured to ISO 9001:2015 standards, it is an essential tool for Physical Chemistry, Surface Science, and Industrial Quality Control laboratories.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Material |
Grade A Borosilicate Glass 3.3 (High Chemical Resistance) |
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Design |
Traube's Type with a central bulb and precision-bore capillary |
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Graduation |
Two permanent markings (Upper and Lower) for volume calibration |
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Dropping Tip |
Precision-ground and polished flat face to ensure uniform drop formation |
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Capacities |
Available in 2ml,5ml,and 10ml bulb volumes |
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Mounting |
Compatible with standard laboratory burette clamps |
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Accuracy |
High-precision capillary bore for consistent drop-weight delivery |
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ISO Compliance |
Manufactured under ISO 9001:2015 Quality Management Systems |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Molecular Interface: Facilitates the understanding of Intermolecular Forces. Learners identify how cohesive forces at the liquid surface affect the size and weight of a falling drop.
- Surface Tension Quantification: Enables the calculation of Surface Tension (γ); learners apply the formula:
γ1=γ2×n1×ρ2n2×ρ1
(where n is the number of drops and ρ is the density).
- Surfactant Analysis: Supports the analysis of "Surface Activity"; students evaluate how the addition of detergents or alcohols significantly increases the number of drops by lowering the liquid's surface tension.
- Experimental Evaluation: Allows students to evaluate the impact of temperature on surface tension, observing how increased thermal energy decreases cohesive strength and leads to more frequent, smaller drops.
Operational Best Practices
To ensure maximum accuracy in a laboratory setting, StemAids recommends:
- Aseptic Cleaning: The stalagmometer must be thoroughly cleaned with chromic acid or a specialized detergent, as even trace amounts of grease can significantly alter drop formation.
- Vertical Alignment: The instrument must be perfectly vertical to ensure the drop detaches evenly from the ground tip.
- Flow Rate Control: The liquid should flow slowly enough that individual drops can be counted accurately without "streaming."
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade, high-protection packaging. The delicate capillary tip is specially protected with foam bracing to prevent chipping during maritime or air transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a standardized laboratory manual for surface chemistry experiments.
- Durability: The Borosilicate 3.3 glass construction maintains its transparency and is resistant to "fogging" or etching from aggressive chemical cleaning agents.
Direct OEM Sourcing Advantages
Procuring the StemAids Stalagmometer directly ensures vertical manufacturing control:
- Diamond-Ground Tips: Direct oversight of the tip-polishing process ensures a perfectly flat surface, which is critical for the consistent formation of drops—the primary variable in the experiment.
- Uniform Capillary Boring: We guarantee a consistent internal diameter, ensuring that the dropping rate remains stable across all units in a standardized laboratory batch.
- Direct Factory Inventory: Guaranteed availability of various bulb sizes and replacement units to support large-scale undergraduate physical chemistry sessions.
- Quality Assurance: Every unit is tested with distilled water at a controlled temperature to verify that it meets the expected drop-count standards before dispatch.
