Do fire sprinklers react to smoke?

Fire sprinklers do not react to smoke; they are designed to activate in response to heat. Each sprinkler head has a glass bulb or fusible link that is sensitive to temperature. When a fire occurs, the heat rises and breaks the glass bulb or melts the link, allowing water to flow. This mechanism is crucial for controlling fires effectively and efficiently, as it targets the source of heat rather than responding to smoke, which can dissipate without indicating the presence of a fire.

The reasoning behind the other choices is that while smoke detectors are designed to respond to smoke in order to provide alerts and early warning, sprinklers operate solely based on heat activation. Thus, stating that fire sprinklers can react to smoke would be misleading, as their purpose and functionality are entirely focused on detecting heat changes associated with a fire.