Ganong’s Potometer

Product Code : SCL-LG-11981

Ganong’s Potometer (SKU SCL-LG-11981) is a glass potometer with a graduated horizontal capillary, a plant chamber and a stopcock-controlled water reservoir, used to measure water uptake by a leafy shoot as an estimate of transpiration. Botany teachers favour it for repeat readings in college practicals, and it also serves senior-school biology. Science Lab Supplies supplies it out of Ambala, India to schools, colleges, training institutes, tender contractors and distributors.

Specifications

A narrow-bore graduated capillary runs horizontally from the plant chamber, so the bubble travels along a level scale. The water reservoir, controlled by a stopcock, pushes the bubble back to a starting mark between trials. Capillary bore, graduation interval, glass grade and reservoir volume are confirmed on the quotation.

Applications and Experiments for Ganong’s Potometer

Because the reservoir and stopcock reset the bubble quickly, this potometer is well suited to several timed readings in one session. Students record bubble travel per minute, reset, repeat, and then change a single factor such as light, air movement, humidity or temperature to compare transpiration rates.

• NCERT Class 11 biology (transport in plants): measuring the rate of transpiration.
• B.Sc. botany plant-physiology practicals: effect of light and wind on water uptake.
• Senior-school biology: demonstrating the transpiration pull and xylem transport.
• Repeat-trial exercises: averaging readings and plotting rate graphs.

Operate the stopcock gently, cut the shoot under water, and never force stoppers onto the glass connections.

Standard Scope of Supply

The set consists of one graduated horizontal capillary tube, one plant-shoot chamber, one water reservoir, one flow-control stopcock, a funnel or filling section and the connecting glass sections. A leafy shoot, rubber stopper, beaker, timer, support base and sealing compound are not confirmed as included.

Packing, MOQ and Lead Time

A quotation can be issued for one potometer or a laboratory batch, and it records packing, delivery time and price for exactly that quantity. A beaker, stand or other potometer designs can be added to the same quotation for school biology lab equipment in India.

Being a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Rwanda, South Africa, Qatar, Sri Lanka, Vietnam and Malaysia. Details and prices are available through the contact page or the enquiry cart, and the lab tender page covers tender purchases.

Frequently Asked Questions

What is the reservoir on Ganong’s Potometer for?
It supplies water to the capillary. Opening the stopcock briefly pushes the bubble back towards its starting mark, so another reading can begin without dismantling the set-up.

Does it measure transpiration directly?
No. It measures water uptake by the shoot. Some absorbed water is retained or used by the plant, so the result is an estimate of transpiration.

Who supplies Ganong’s Potometer?
It comes from Science Lab Supplies in Ambala, India, which quotes, packs and ships the apparatus to schools, colleges and tender contractors.

How is it different from the H-type potometer?
Ganong’s design uses a horizontal graduated capillary with a stopcock-controlled reservoir for resetting, while the Student Potometer ‘H’ type combines its plant connection, reservoir and capillary in one H-shaped glass piece.

Related Potometers and Glassware

Transpiration practicals are clearer when students try more than one potometer and relate water uptake to respiration. These four items from the same range fit that sequence and can be listed on one quotation with Ganong’s Potometer.

• Student Potometer ‘H’ type — compact design for student groups.
• Farmers Potometer — bottle-based potometer with funnel reservoir.
• Respirometer with Stand — respiration practical for the same course.
• Borosilicate Beaker — water for the open capillary end.

Browse the full Lab Glassware range or all school lab equipment.

Last updated: 25 September 2026