Smoke detectors are devices designed to detect smoke as an indicator of fire. They work by using sensors to identify smoke particles in the air, triggering an alarm to alert occupants of a potential fire. These devices are essential for home and building safety, providing early warning to help prevent injuries and fatalities. There are two main types of smoke detectors: ionization smoke detectors and photoelectric smoke detectors. Ionization detectors are more responsive to flaming fires, while photoelectric detectors are better at sensing smoldering fires. Many modern smoke detectors also include features like carbon monoxide detection and connectivity to smart home systems for added safety.