Conventional systems are essentially simple switches that are either “on” or “off”. They cannot distinguish between a real fire and the various non-fire phenomena that can trigger an alarm such as tobacco smoke, dust and steam. With conventional systems the control panel is only able to indicate the zone or circuit that an activated (or faulty) detector is on, they can not identify the individual device.

Analogue addressable systems have constant two-way communication between the control panel and the detectors in the field. Each detection device on an analogue addressable system has its own unique address within the system and the control panel is able to identify each device individually in the case of a fire or a fault

Microprocessor based fire alarm panel comes with built-in programmer. This alarm panel is specially designed with sensors to spot changes related with fire from surroundings and automatically blow alarm. These are operated with electric energy and are available in four types such as conventional panels, addressable panels, multiplex systems and coded panels.