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Smoke Alarms - Putting Radiation To Use.
Member rating: No Rating | Words: 586 | Submitted: Wed Mar 12 2008
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Putting Radiation To Use : Smoke Alarms. (Below) Diagram showing the basic set up of a smoke detector and how it works. How Do Smoke Alarms Work Then? There are two main types of smoke detectors: ionization detectors and photoelectric detectors. A smoke alarm uses one or both methods, sometimes plus a heat detector, to warn of a fire. The type of smoke detector that will be concentrated on throughout this leaflet is an ionization detector. Ionization chamber smoke detectors contain a small amount of radioactive material encapsulated in a metal chamber. They take advantage of the ions created by ionizing radiation to develop a low, but steady electrical current. Smoke particles entering the chamber disrupt the current and trigger the detector's alarm. Okay, So if Smoke Detectors Contain Radioactive Material, Aren't They Dangerous? The idea that the radioactive material in smoke alarms is in someway dangerous to the human body is nothing more than a...
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