What is the primary function of a smoke detector?

The primary function of a smoke detector is to detect smoke from a fire. Smoke detectors are specifically designed to sense the presence of smoke in the air, which is an indication of combustion and the possibility of a fire developing. They typically operate using one of two technologies: ionization or photoelectric sensors. Ionization smoke detectors are more responsive to flaming fires, while photoelectric detectors are better at sensing smoldering fires. The quick detection of smoke allows for timely alerts, giving occupants valuable time to evacuate and take necessary actions to respond to the emergency.

In contrast, while detecting airborne toxins, monitoring carbon monoxide levels, and alerting about water leaks are important safety measures, these functions are not the primary purpose of a smoke detector. Devices exist for monitoring those specific hazards, but smoke detectors are distinctly focused on the presence of smoke as a critical indicator of fire risk.