How Do Smoke Detectors Work? Understanding Ionization and Photoelectric Sensors
Discover how smoke detectors operate with ionization and photoelectric sensors to keep you safe.
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Smoke detectors typically operate in one of two ways: ionization or photoelectric sensors. Ionization detectors use americium-241 to ionize the air; smoke disrupts this process, triggering the alarm. Photoelectric detectors use a light beam; when smoke enters the chamber, it scatters the light, setting off the alarm. Combination detectors utilize both technologies for enhanced safety.
FAQs & Answers
- What types of smoke detectors are there? There are two main types: ionization and photoelectric detectors, with some models combining both technologies.
- How often should smoke detectors be tested? It's recommended to test your smoke detectors at least once a month and replace the batteries at least once a year.
- What is the lifespan of a smoke detector? Most smoke detectors have a lifespan of 8 to 10 years, after which they should be replaced.
- Can smoke detectors detect carbon monoxide? No, smoke detectors specifically detect smoke; carbon monoxide detectors are needed to identify CO.