In the field of alert systems, fire alarm systems occupy a prominent position. They are an indispensible part of the safety (and now often mandatory) in private and public buildings. Fire detectors systems are technical devices or facilities that trigger an alarm in case of fire. A distinction is made between automatic fire alarms and non-automatic fire alarms. Automatic fire detectors detect a fire based on physical properties. Non-automatic fire detectors must be operated manually. With automatic fire detectors, you have the choice between fire gas or smoke detectors, heat detectors, smoke detectors, flame detectors and multi-sensor detectors and various special detectors. Manual fire detectors are non-automatic fire detectors.