What type of device is necessary for the automatic release of rolling shutters?

The automatic release of rolling shutters is designed to operate in response to specific conditions that indicate a potential hazard, particularly smoke or fire situations. A smoke detector is crucial for this purpose because it can sense the presence of smoke in the environment, which often signifies a fire hazard. When a smoke detector is activated, it triggers the rolling shutters to open automatically, allowing for smoke and heat to escape and aiding in fire safety measures.

While motion detectors serve to detect movement, thermal detectors identify changes in temperature, and sound detectors respond to acoustic changes, none of these devices are specifically focused on detecting the early signs of fire, such as smoke. Their purposes do not align with the necessary function of releasing rolling shutters in fire emergencies. Thus, the smoke detector is the correct choice because it directly connects to the safety protocols for managing hazards in enclosed spaces.