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SMOKE DETECTOR<br />
Inside of Smoke Detector with Radioactive Emitter<br />
A radioactive source ionizes charged air particles between two electrodes. When smoke particles enter the chamber they attract the ions and reduce the current. A microchip responds to the reduced current by activating an alarm.

Fphoto-50690102C-3JY.jpg

SMOKE DETECTOR
Inside of Smoke Detector with Radioactive Emitter
A radioactive source ionizes charged air particles between two electrodes. When smoke particles enter the chamber they attract the ions and reduce the current. A microchip responds to the reduced current by activating an alarm.

Copyright:© 2001 Jeff J. Daly - Fundamental Photographs

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