Abstract: The invention is directed to a pressure controller and a method for monitoring and controlling the pressure level in a fire protection piping network maintained under vacuum pressure and for detecting a positive pressure variation in the network. The rate of pressure increase is used to detect the opening of a sprinkler head in the sprinkler piping network.

Abstract: The virtual accelerator is for detecting an alarm condition within a pressurized gas sprinkler system. It has a pressure monitor for monitoring pressure within the pressurized gas sprinkler system, and generating a pressure signal representative of the pressure thereof; a sampler for sampling the pressure signal at a given frequency during a predetermined period of time, and generating a series of pressure values; and a detector for detecting variations of the pressure values, and generating an alarm signal if the variations are within a predetermined range. A method for detecting an alarm condition within a pressurized gas sprinkler system is also proposed.

Abstract: There is described an electronic fire reporting and sprinkling control module to be connected to a control bus of a fire alarm system, and to a flow control valve which controls flow of extinguishing fluid into a sprinkler system. The sprinkler system can be monitored by pressurized air.