What sensors do smoke detectors use?
Smoke detectors are essential devices in any home or building to ensure early detection of fires. But have you ever wondered what sensors are used in these life-saving devices? Ionization Smoke Detectors Ionization smoke detectors are one of the most common types used in homes. These detectors contain a small amount of radioactive material, usually americium-241, which ionizes the air inside the detector. When smoke enters the chamber, it disrupts the ionization process, triggering the alarm. Photoelectric Smoke Detectors Photoelectric smoke detectors work on a different principle. They use a light source (usually an LED) and a sensor to detect smoke particles. When smoke enters the chamber, it scatters the light, causing it to hit the sensor and trigger the...