Which device is NOT part of an alarm detection system?

In the context of an alarm detection system, a smoke barrier is not considered a part of the actual detection system itself. Instead, smoke barriers serve as structural elements designed to contain smoke and prevent it from spreading within a building during a fire. Their primary function is related to fire containment and protection rather than detection or notification.

In contrast, the alarm initiation device, fire control panel, and notification system are all integral components of an alarm detection system. The alarm initiation device activates the system when a potential fire is detected, the fire control panel processes the information from detection devices, and the notification system alerts occupants of a fire emergency. Each of these components plays a crucial role in detecting a fire and notifying individuals, making the smoke barrier distinct from this functional group.