An example of a manually activated fire alarm component is a:

A pull station is a manually activated fire alarm component because it requires a person to physically activate it in order to initiate an alarm. When someone pulls the lever or pushes the button on a pull station, it sends a signal to the fire alarm system, alerting occupants to evacuate the premises and notifying emergency services.

In contrast, a thermally sensitive device automatically responds to changes in temperature, such as smoke detectors or heat detectors that activate without human intervention. Similarly, flame detectors detect the presence of flames based on specific wavelengths of light emitted when combustion occurs, and water flow detectors trigger an alarm due to the flow of water through a sprinkler system, both of which operate automatically rather than requiring manual activation.