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Consists of a glass tube mounted inside a bigger plastic tube. A brass screw fitting is installed in the bottom so a metal base can be screwed in. A plunger with a seal at the end is inserted into the top of the tube.
Light a piece of tissue on fire via (approximately) adiabatic compression of gas. Demonstrates an example of one type of thermodynamic process. Shows how the ideal gas law can be used to predict what happens when a volume of air is rapidly compressed. Additionally can be used to demonstrate the flash point of cotton; certain materials spontaneously ignite when exposed to sufficiently high temperatures.
Currently there are three compression igniters available, two newer professional models, and one cheap blue plastic model.
If the plunger is not pushed fast enough, the tissue will smoke but not ignite. If you haven't used this demonstration before it's highly recommended that you test it out beforehand, particularly if you're attempting to ignite a new material.
Demo room information