Quick Answer:The Farmer’s Potometer is a simple borosilicate glass potometer with a wide-bore specimen tube, a horizontal capillary marked in 1 mm divisions and a funnel reservoir with stopcock, for measuring water absorption by a leafy shoot.
Last updated: 19 October 2026
Key Features
Simplified design for quick assembly.
Wide-bore specimen tube connected to a graduated capillary.
Horizontal fine-bore capillary with permanent 1 mm graduations.
Vertical glass funnel reservoir with stopcock to reset the air bubble.
Stand with spring clips and an airtight drilled rubber stopper.
Technical Specifications
Specification
Value
Material
Borosilicate glass 3.3
Capillary
Horizontal, fine bore, 1 mm graduations
Specimen tube
Wide bore
Reservoir
Vertical glass funnel with stopcock
Mounting
Stand with spring clips
Seal
Rubber stopper with drilled hole
How It Is Used
Cut the shoot at an angle under water so that no air enters the xylem, fit it through the stopper, and smear petroleum jelly round the stopper and stem to make the joint airtight. As water is taken up, the air bubble travels along the capillary, and the reservoir stopcock moves it back to the start for each new run.
Frequently Asked Questions
Why is the shoot cut under water for the Farmer’s Potometer?
Cutting under water stops air entering the xylem, which would break the continuous water column and spoil the reading.
Institutions and distributors in Uganda, France, Solomon Islands, Eswatini, Chile and Syria can request an export quotation for the Farmer's Potometer.
For a quotation on the Farmer's Potometer, contact JLab India on +91-8569909696.
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