Abstract: Exemplary embodiments provide for a method for continuous measurement of displacements profile of building structures and a sensor for implementation of this method for repeated, automatic displacements profile measurements of the medium by means of optical fiber elements. This is of particular relevance in engineering structures, engineering structure elements, geotechnical structures. The apparatus is characterized in that the measurement involves a measuring sensor, which is constructed of a core with coupled optical fiber sensing elements for determining the core strains and an optical fiber sensing element for determining temperature, placed freely in an axial channel of the core, making possible to perform measurements in such a way, which that allows for compensation of the influence of sensor temperature.