The earliest possible fire detection is of immense importance in rail traffic for two reasons: on the one hand, personal protection and thus the earliest possible evacuation that may be necessary in an emergency is of paramount importance, on the other hand, the damage to the trains themselves should be kept as low as possible.
In the early phase of a fire, the so-called pyrolysis phase, i.e. before the formation of open flames, even the smallest quantities of smoke particles are detected by an early fire detection system. The monitoring of fire parameters such as smoke and temperature in the protected areas is ensured by a wide selection of automatic detectors. These can be air sampling smoke detectors, linear heat detectors, optical smoke detectors, temperature detectors or multi-criteria detectors. A large number of input and output modules are available for implementing the controls or for recording external messages. These modules can be integrated into the ring bus in combination with a fire alarm control panel or as a stand-alone solution.
Especially when used in public areas of trains, the selected detectors must have a high level of security against false alarms, for example in order not to trigger an alarm by cigarette smoke. Fire detection should also be particularly protected against vandalism.