Student Potometer ‘H’ type

Product Code : SCL-CLE-11905

The StemAids ‘H’ Type Student Potometer is a specialized glass apparatus engineered for the quantitative measurement of water uptake in leafy shoots, which serves as an indirect proxy for the rate of transpiration. Its unique "H" configuration allows for the easy introduction of a plant specimen, a reservoir for resetting the water column, and a graduated capillary tube for tracking movement. Manufactured to ISO 9001:2015 standards, it is a foundational instrument for Plant Physiology curriculum in both University and Secondary School laboratories.

Technical Specifications

Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)

• Physiological Interface: Facilitates student understanding of the Cohesion-Tension Theory. Learners identify how water loss at the leaves creates a "pull" that moves the entire water column.
• Transpiration Quantification: Enables the calculation of Water Loss Rate; learners apply the graduated scale to record the distance an air bubble travels over a specific time interval (mm/min).
• Variable Analysis: Supports the analysis of "Environmental Stressors"; students evaluate how the rate of transpiration changes when the plant is exposed to wind (fan), light (lamp), or high humidity (plastic bag).
• Experimental Evaluation: Allows students to evaluate the difference between total water uptake and actual transpiration (recognizing that a small fraction of water is used for turgidity and photosynthesis).

Operating Principle: The "Air Bubble" Method

1. The entire apparatus is filled with water, ensuring no stray air bubbles are trapped.
2. A fresh leafy shoot is cut under water and inserted into the vertical arm via an airtight bung.
3. A single air bubble is introduced into the end of the horizontal capillary tube.
4. As the plant transpires, it draws water from the capillary, pulling the air bubble along the scale for measurement.
5. The reservoir stopcock is opened to push the bubble back to the "zero" position for subsequent trials.

International Logistics & Compliance

StemAids ensures comprehensive OEM readiness for global institutional procurement:

• Packaging: Export-grade, shock-absorbent packaging. The horizontal capillary arm is specially braced to prevent snapping during maritime transit.
• Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a standardized lab manual for "Factors Affecting Transpiration."
• Durability: The Borosilicate 3.3 glass construction is resistant to "grease-freeze" in the stopcock and maintains optical clarity through repeated cleaning cycles.

Direct OEM Sourcing Advantages

Procuring the StemAids ‘H’ Type Potometer directly ensures vertical manufacturing control:

• Precision Bore Consistency: Direct oversight of the capillary manufacturing ensures a uniform internal diameter, which is vital for comparing data across different lab stations.
• Leak-Proof Stopcock Assembly: We ensure the reservoir valve is vacuum-tested to prevent "vacuum leaks" that could invalidate the transpiration readings.
• Direct Factory Spares Availability: Guaranteed availability of replacement bungs and capillary tubes to ensure the apparatus remains functional across multiple academic years.
• Stable Base Engineering: Our bases are weighted and balanced to prevent the top-heavy apparatus (once filled with water and the plant) from tipping over during experiments.