The fibre optic anchor strain chain ASC-01 contains different strain segments in series. The sensor configuration has a small diameter and is designed to become embedded inside structures (e.g. concrete, grout, plaster, …). Each strain segment contains 1 FBG in between two anchor points. A relative displacement between the two anchor points is transferred into a change in the strain state of the FBG. The standard length of a segment can be chosen between 0.5 and 5 meters. The sensor can be connectorised at both ends to make series configurations possible.