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Comparing the effectiveness of ionizing and photoelectric smoke detectors Featured science projectScience project video


The hypothesis that the ionizing smoke detector would be able to detect the smoke more effectively, has been proven to be true.

Smoke detectors are very important devices that function as an early warning system when a fire is detected. They enable us to take the necessary measures to stop the fire before it spreads and becomes more difficult to manage. Smoke detectors can help to save lives and reduce the damage caused by sudden fires in homes, as well as commercial and industrial buildings.

Also consider

Try to repeat this  science fair project by using other sources of smoke like a candle, joss stick or burning papers.

The experiment can also be repeated by placing the smoke detector in different positions around the smoke detector.


Smoke detectors -

How smoke detectors work -

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Complexity level:
Project cost ($):
Time required:
1 hour for preparation, 2 hours for observation
Material availability:
Easily found at a hobby store
Safety concerns:

Adult supervision required. Take all necessary precautions to ensure fire safety. Be extremely careful when handling fire.