Kinetic Theory Model – Motor‑Driven Demonstration of Particle Motion (CE Marked)

This Kinetic Theory Model provides a clear and engaging demonstration of particle behaviour in gases and is perfect for teaching kinetic theory concepts in school and college physics classrooms. Fully CE marked, the apparatus is designed for safe, reliable use in educational settings.

The model consists of a transparent perspex tube measuring 400mm in length and 50mm in outside diameter, allowing students to observe particle motion clearly from all angles. Inside the tube is a freely sliding expanded‑polystyrene piston and a loose‑fitting metal cap, which respond visibly to changes in particle movement.

The tube is securely mounted on a durable ABS plastic housing that contains an agitator piston driven by an electric motor. When activated, the motor agitates the supplied plastic balls, simulating the random motion and collisions of gas particles. Also included are two floats, which further help illustrate gas‑related phenomena such as buoyancy, pressure, and density changes.

Key Features

• CE Marked for safe educational use
• Clear 400mm × 50mm perspex tube for optimal visibility
• Freely moving expanded‑polystyrene piston
• Loose‑fitting metal cap to show particle‑induced pressure changes
• Motor‑driven agitator piston housed in a durable ABS base
• Supplied with balls to represent gas particles
• Includes two floats for additional demonstrations
• Demonstrates key principles of kinetic theory, gas pressure, and particle behaviour

Ideal for School Science Lessons

This kinetic theory model is an excellent teaching resource for KS3, GCSE, and A‑Level physics, helping students visualise:

• Random motion of gas particles
• Brownian motion
• Pressure caused by particle collisions
• Changes in volume and density
• The relationship between temperature, particle speed, and pressure
• How gas particles exert force on pistons and container walls
• Real‑world interpretations of the kinetic theory of matter

Teachers can use this model to demonstrate:

• Why gases expand when heated
• How pressure increases with temperature
• Why gas particles move faster at higher energy levels
• The difference between ordered and random motion

The moving piston and bouncing particles provide a vivid, memorable representation of microscopic processes that students often struggle to imagine—making this model invaluable for deepening conceptual understanding.