Potometer Apparatus – “Ganong’s” Type (KS3+)

This Ganong‑type Potometer is designed for demonstrating transpiration rates and water absorption in plant shoots under a variety of controlled environmental conditions. Suitable for KS3 and above, it provides a clear and effective way to investigate how factors such as light, temperature, humidity, and air movement influence the movement of water through plants.

A freshly cut plant shoot is sealed into a stopper that fits securely into the end tube, and the entire apparatus is filled with water to eliminate air gaps. The open end of the capillary tube is placed in a beaker of water. An adjustable air bubble in the capillary tube acts as an indicator; its position is easily reset by opening the glass stopcock to draw water from the reservoir.

The complete apparatus is mounted on a varnished wooden base using strong spring clips for stability and ease of handling during classroom demonstrations.

Key Features

• Classic Ganong’s Potometer design
• Demonstrates transpiration and water uptake by plant shoots
• Adjustable air bubble for clear, measurable results
• Glass stopcock for precise water adjustment
• Mounted on a varnished wooden base with spring clips
• Capillary bore: 1 mm
• Base size: 20 × 80 mm
• Reliable, easy‑to‑use mechanism suitable for school investigations

Ideal for School Science Lessons

Perfect for KS3–KS5 biology, this potometer supports practical activities such as:

• Measuring transpiration rate under different environmental conditions
• Investigating the effects of light intensity, temperature, humidity, and wind
• Demonstrating water movement through xylem vessels
• Introducing students to plant physiology and water transport
• Supporting required practicals in GCSE and A‑Level biology

Robust, simple to operate, and highly visual, this Ganong‑type potometer is an essential resource for teaching plant transport and transpiration in school science.