Which fire detection system involves a pressure switch activated by gas release?

The Lindberg fire detection system utilizes a pressure switch that is activated by the release of gas. This system features a sensing element that, upon detecting the high temperatures associated with a fire, initiates the release of a fire extinguishing agent. The pressure switch responds to the pressure changes caused by the gas release, providing an indication of a fire condition and activating the appropriate alarms and systems to mitigate the fire hazard.

The Kidde continuous loop system, while effective in detecting fires, operates based on a thermal sensing principle using a wire that expands and contracts with temperature changes, rather than a pressure switch method. The thermocouple system measures temperature changes at specific points using two different metals, and it doesn't rely on gas release; hence, it doesn't fit the description provided in the question. The photoelectric smoke detector primarily detects smoke particles rather than recognizing changes in pressure or gas release, making it unsuitable for the specified function in the question. Thus, the Lindberg fire detection system stands out as the only option that matches the criteria of using a pressure switch activated by gas release.