Farmers Potometer

Product Code : SCL-CLE-11906

The StemAids Farmer’s Potometer is a robust, simplified laboratory apparatus engineered for the quantitative measurement of water absorption by a leafy shoot. Unlike the more complex Ganong’s or 'H' type variants, the Farmer's model is designed for rapid assembly and ease of use in high-enrollment secondary and undergraduate biology labs. It provides a direct interface for studying the transpiration stream and the physical factors influencing water transport in plants. Manufactured to ISO 9001:2015 standards, it is an essential tool for quantifying plant water relations.

Technical Specifications

Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)

• Dynamic Interface: Facilitates the understanding of the Transpiration-Cohesion-Tension Mechanism. Learners identify how the evaporation of water from the leaves creates the negative pressure required to pull the air bubble through the capillary.
• Transpiration Quantification: Enables the development of mathematical modeling in biology; learners apply the formula V=πr2d (where r is the radius of the capillary and d is the distance traveled) to calculate the actual volume of water transpired.
• Environmental Analysis: Supports the analysis of "Abiotic Factors"; students evaluate how the rate of bubble movement changes when the plant is subjected to different stimuli (e.g., using a hairdryer to simulate wind or a lamp to simulate high light intensity).
• Comparative Evaluation: Allows students to evaluate the "Transpiration Efficiency" of different plant species (e.g., comparing a broad-leafed mesophyte to a narrow-leafed xerophyte).

Procedural Optimization (OEM Best Practices)

To ensure high-fidelity data, StemAids recommends the following "underwater assembly" protocol:

1. Submerged Cutting: The plant shoot must be cut at an angle underwater to prevent air from entering the xylem (embolism), which would break the continuous water column.
2. Airtight Verification: Apply a thin layer of petroleum jelly around the rubber stopper and the plant stem to ensure the system is 100\text{%}
3. Bubble Management: Use the stopcock on the reservoir funnel to precisely control the position of the air bubble, ensuring a "zeroed" starting point for every experimental run.

International Logistics & Compliance

StemAids ensures comprehensive OEM readiness for global institutional procurement:

• Packaging: Export-grade, double-walled reinforced packaging. The horizontal capillary arm is supported by custom-fitted inserts to prevent stress-fractures during maritime or air transit.
• Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and a standardized laboratory manual for plant physiology.
• Durability: The Borosilicate 3.3 glass is highly resistant to chemical cleaners and accidental thermal shock, ensuring a multi-year classroom life-cycle.

Direct OEM Sourcing Advantages

Procuring the StemAids Farmer’s Potometer directly ensures vertical manufacturing control:

• Calibrated Capillary Boring: Direct oversight ensures a perfectly uniform internal diameter throughout the capillary, eliminating data variance caused by glass thickness fluctuations.
• Vacuum-Tested Stopcocks: We utilize precision-ground glass or high-grade PTFE stopcocks to prevent the "creeping" of water from the reservoir that can invalidate low-rate transpiration readings.
• Direct Factory Inventory: Guaranteed availability of replacement glass components, ensuring that accidental breakage doesn't result in the decommissioning of the entire apparatus.
• Quality Assurance: Every unit undergoes a hydrostatic pressure test to confirm that all joints and seals are airtight before final shipping.