How do smoke detectors work?

Smoke detectors are an essential safety feature in modern homes and buildings. They work by detecting smoke particles in the air and alerting the occupants to potential danger. The most common type of smoke detector is the ionization smoke detector, which uses a small amount of radioactive material to ionize the air inside the detector. When smoke enters the detector, it disrupts the ionization process and triggers the alarm.

Another type of smoke detector is the photoelectric smoke detector, which uses a light source and a photosensitive sensor to detect smoke. When smoke enters the detector, it scatters the light and triggers the alarm. Some smoke detectors use a combination of ionization and photoelectric technology to provide better coverage.

Smoke detectors are typically powered by batteries or by a wired connection to the building's electrical system. It is important to test smoke detectors regularly and replace batteries at least once a year. Smoke detectors should also be installed in every bedroom, outside each sleeping area, and on every level of the home.