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IONIZING SMOKE DETECTOR<br />
Radioactive Source Ionizes Charged Air Particles<br />
(close-up) 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-37099407B-1MD.jpg

IONIZING SMOKE DETECTOR
Radioactive Source Ionizes Charged Air Particles
(close-up) 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:© 1994 Michael Dalton - Fundamental Photographs

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Michael Dalton