A Fire Alarm System has a number of devices working together to detect and warn people through visual and audio appliances when smoke, fire, carbon monoxide or other emergencies are present. These alarms may be activated automatically from smoke detectors, and heat detectors or may also be activated via manual fire alarm activation devices such as manual call points or pull stations. Alarms can be either motorized bells or wall mountable sounders or horns. They can also be [(speaker strobes]) which sound an alarm, followed by a voice evacuation message which warns people inside the building not to use the elevators (Optional).

These are an early warning system for industrial or residential complexes. A Fire Alarm System is a passive system, meaning it does not stop the fire / Leakage from spreading. It means that the Fire Alarm System does not actively fight the fire / Leak. The main function of a Fire Alarm System is to give an early warning, that the fire has taken place in the factory or residential complex. This means that, the people in proximity to that area have an early warning to evacuate the building. However the fire will continue to burn, unless if an active system like Fire Hydrant System or Fire Sprinkler System is engaged.