Which component of a fire alarm system is responsible for detecting fire?

The component responsible for detecting fire within a fire alarm system is the initiating device. These devices are designed to sense the presence of fire or smoke and trigger the alarm system. Initiating devices can include smoke detectors, heat detectors, or manual pull stations. Their primary function is to initiate the alarm sequence when a potential fire hazard is identified.

The other components serve different roles within the fire alarm system. Indicating devices, for instance, provide visual or audible alerts to occupants once the alarm is triggered, while the control unit processes signals from the initiating devices to manage the overall operation of the alarm system. The alarm signal then communicates the alert to occupants or emergency services. Understanding the functions of each component highlights the critical role of initiating devices in the early detection of a fire, allowing for timely intervention and safety measures.