FIELD: fire safety.
SUBSTANCE: multistage fire extinguishing system is configured to deliver fire extinguishing means in response to multiple detections of a fire condition over time. In one embodiment, the multistage fire suppression system comprises at least two pressure tubes each having a different internal pressure. Each pressure tube is adapted to generate a pneumatic signal in response to exposure to a different trigger event. Pneumatic signal is used to activate a suppression system and release the fire suppressant material from a container.
EFFECT: multistage fire extinguishing system may also be configured to signal a secondary hazard detection system that a fire has been detected.
22 cl, 5 dwg
