Name a typical component of fire alarm systems.

Smoke detectors are a fundamental component of fire alarm systems because they are designed to detect the presence of smoke, which is an indicator of fire. When smoke is detected, these devices trigger the alarm system to alert occupants of the building, which is crucial for ensuring safety and responding promptly to potential fire hazards. Smoke detectors utilize various technologies, such as ionization or photoelectric sensing, to identify smoke particles in the air, making them vital for both early warning and fire prevention. Their role in detecting fires and initiating an emergency response highlights their importance in any fire alarm system.