Controller for system of linear detection of temperature for optical fiber, for distance of 4 km for channel. Extendable to 4 channels (maximum 16 km in total) or to 2 channels in curl of 4 km (maximum 8 km in total). Designed, made and certificate according to norm EN54-5. Range of detection of temperature from-40 °C up to 1000 °C. It allows the detection of the direction of spread of the fire. Resolution of detection from 0,5 up to 8 meters with cycles of readings of 10 seconds. Programming of 256 zones for channel, with 5 criteria independent from detection of configurable alarm for zone. Energy of exit laser very low, intrinsically sure, with certification ATEX the IInd 1 GD I M2. He has 4 Income and 20 programmable Exits of relay, with possibility of extension.