Description The displacement sensor D-01 makes use of the internal strain sensitivity of the FBG. The FBG is fixed inside a ruggedised stainless steel housing between two anchoring points. The housing is foreseen of a sliding mechanism that allows both ends to move freely relative to each other and an integrated spring mechanism that allows to slide over large distances without overstressing the FBG. In order to compensate for temperature influences, a high resolution temperature probe is integrated within the housing. The housing is made of stainless steel and is terminated with an optical connector or an integrated optical adapter. Pigtail lengths and connector can be specified following the needs of every application. Features The displacement sensor D-01 can measure displacement and temperature with a resolution of 0,05% Full Scale and 0,1 °C respectively and an accuracy of 1% Full Scale and 1 °C respectively. The displacement range can be chosen between 1 and 8 cm . Applications The displacement sensor D-01 can be applied for positioning measurements. The sensor can also be used with special packers in bore holes to determine geological settlements or can be surface mounted to detect movements between the anchoring points.