Ganong Type Potometer

The Ganong Type Potometer is a plant physiology laboratory apparatus used for measuring water uptake by a leafy shoot as an indirect estimate of transpiration. It is suitable for supervised school, college, university, and botany laboratory experiments where students investigate plant-water relations and factors that affect transpiration rate.

Product Description

The STEMAids Ganong Type Potometer supports quantitative experiments on water uptake and transpiration. In a typical practical, a freshly cut leafy shoot is connected to a water-filled airtight apparatus. Movement of an air bubble through the capillary measuring section is monitored over a fixed time interval to estimate water uptake.

The Ganong design incorporates a reservoir and capillary measuring arrangement that allows repeated observations during plant physiology experiments. Exact material, reservoir capacity, capillary bore, scale divisions, overall dimensions, and mounting arrangement of this STEMAids model are [confirm]. Related equipment is available under Biology Lab Products and Laboratory Glassware.

Key Features

• Designed for transpiration studies: Measures water uptake by a leafy shoot under controlled experimental conditions.
• Quantitative measurement: Capillary displacement can be recorded against time for comparative experiments.
• Bubble-tracking principle: Makes water movement visible for practical plant physiology demonstrations.
• Reservoir-based resetting: Ganong-type designs allow the measuring bubble to be repositioned between trials.
• Comparative experimentation: Supports investigations involving light, airflow, humidity, and temperature.
• No electrical supply required: Operates through water uptake and movement within the capillary system.
• Teaching-focused apparatus: Suitable for supervised botany and biology practical classes.

Technical Specifications

What’s Included in the Kit

• Ganong Type Potometer apparatus
• Water reservoir
• Capillary measuring section
• Plant-shoot connector or stopper
• Stopcock / flow-control arrangement
• Base, stand, or mounting clips 
• Instructions or additional accessories 

Applications / Uses

• Measuring water uptake by a leafy plant shoot.
• Estimating relative transpiration rate.
• Investigating the effect of light intensity on transpiration.
• Comparing transpiration under different airflow conditions.
• Investigating the influence of humidity or temperature.
• Teaching plant-water relations and experimental measurement.

How to Use the Ganong Type Potometer

1. Fill the potometer completely with water and remove unwanted air from the system.
2. Prepare a healthy leafy shoot according to the approved laboratory method, cutting the stem under water where required.
3. Fit the shoot securely into the apparatus and ensure the connection is airtight.
4. Introduce a small air bubble into the capillary measuring section using the prescribed procedure.
5. Allow the apparatus and plant shoot to equilibrate under the selected experimental conditions.
6. Record the starting position of the bubble and measure its movement over a fixed period.
7. Use the reservoir or flow-control arrangement to reset the bubble where applicable.
8. Repeat the experiment while changing one environmental factor and keeping other variables controlled.

Safety note: Handle glass and capillary components carefully and secure the apparatus during use. A potometer measures water uptake rather than directly measuring the amount of water vapour leaving the leaves.

Care & Maintenance

• Rinse the internal water path after each experiment and allow the apparatus to dry before storage.
• Check capillary sections, connections, stoppers, and stopcocks for leaks or damage.
• Do not force stems or connectors into narrow or fragile openings.
• Store the apparatus in a protected location to reduce breakage and contamination.

Why Choose STEMAids

STEMAids is the STEM education brand of Eduscope Smart Learning Solutions Private Limited, a New Delhi-based manufacturing enterprise. Its registered activities include the manufacture of laboratory and pharmaceutical glassware, scientific R&D, and educational services. The company states that it operates ISO 9001:2015 and ISO 14001:2015 management systems and holds a DGFT Importer-Exporter Code for international trade. Institutions can also explore General Lab Products and Lab Experiment Practice Kits.

Frequently Asked Questions

What is a Ganong Type Potometer used for?

A Ganong Type Potometer is used to measure water uptake by a leafy shoot. The measured uptake is commonly used as an indirect estimate of transpiration rate.

How does a Ganong potometer work?

A plant shoot draws water through an airtight system. Movement of an air bubble in the capillary section is measured over time to quantify water uptake.

Does a Ganong potometer directly measure transpiration?

No. It directly measures water uptake. Because most water absorbed by a leafy shoot is subsequently lost through transpiration under suitable experimental conditions, uptake provides an indirect estimate.

Why does a Ganong potometer have a reservoir?

The reservoir in a conventional Ganong potometer provides water that can be admitted to the measuring system, allowing the air bubble to be repositioned for another observation.

What factors can be studied using a Ganong potometer?

Students can investigate how light, temperature, humidity, or airflow affects water uptake and estimated transpiration while keeping other experimental variables controlled.

What material is the STEMAids Ganong Type Potometer made from?

The construction material for this specific STEMAids model is [confirm]. It should not be described as borosilicate glass or another material until the product specification is verified.