School of Physics Lecture Demonstration Manual

El-12 Cottrell Smoke Precipitator

Published: Tuesday 14 March 2006 - Updated: Thursday 31 March 2011

Aim

To demonstrate an industrial application of electrostatics.

Apparatus

Diagrams

Click on pictures to enlarge.

The Smoke Precipitator

Smoke Precipitator Setup

Smoke Precipitator Diagram

Videos

Smoke Precipitator

Cottrell Smoke Precipitator

Description

Smoke from incense sticks passes through a glass tube containing a central electrode and an outer earthing mesh. The smoke is clearly visible. On applying high voltage to the central electrode the smoke issuing from the top of the "chimney" is greatly reduced.

Safety notes

Electrical safety 

Fire/Burn Safety 

Maintenance 

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