The System Sensor conventional range includes devices that are non-addressable. This range includes the Vision range of detectors and a full selection of Intrinsically Safe fire alarm system devices for use in hazardous areas where there may be high risk of explosion. The System Sensor analogue addressable range includes detectors, call points, interfaces and sounders for use on System Sensor protocol analogue addressable fire alarm systems. These devices are each capable of having their own unique loop address. This address is used with the main control panel to give a text description of the devices location.