Method for manufacturing a displacement measuring device , the method comprising the steps of: - providing a plate-shaped support basis including two support portions separated by a gap , the support basis being deformable such that the two support portions are displaceable with respect to each other; - arranging a first round accommodation space in a first one of said two support portions, adjacent said gap , perpendicular to the plate-shaped support basis; - arranging a second round accommodation space in a second one of said two support portions, adjacent said gap , perpendicular to the plate-shaped support basis, wherein a virtual line connecting the first accommodation space and second accommodation space defines a sensor orientation direction (X); - providing a sensor system that comprises a sensor unit and a reference unit , wherein -- the sensor unit comprises a sensor housing and a sensing element mounted in the sensor housing, and -- the reference unit comprises a reference housing and a sensor reference element mounted eccentrically in the reference housing; - inserting the reference unit into the first accommodation space with an insertion displacement direction (Z) perpendicular to said sensor orientation direction (X) and perpendicular to the plate-shaped support basis; - placing the sensor unit into the second accommodation space with an insertion displacement direction (Z) perpendicular to said sensor orientation direction (X) and perpendicular to the plate-shaped support basis; - adjusting the positioning of the sensor system by rotation of the reference housing about its corresponding rotation axis in the first round accommodation space ; - fixating the reference unit and the sensor unit in their corresponding accommodation spaces; - providing a plate-shaped support basis including two support portions separated by a gap , the support basis being deformable such that the two support portions are displaceable with respect to each other; - arranging a first round accommodation space in a first one of said two support portions, adjacent said gap , perpendicular to the plate-shaped support basis; - arranging a second round accommodation space in a second one of said two support portions, adjacent said gap , perpendicular to the plate-shaped support basis, wherein a virtual line connecting the first accommodation space and second accommodation space defines a sensor orientation direction (X); - providing a sensor system that comprises a sensor unit and a reference unit , wherein -- the sensor unit comprises a sensor housing and a sensing element mounted in the sensor housing, and -- the reference unit comprises a reference housing and a sensor reference element mounted eccentrically in the reference housing; -- the sensor unit comprises a sensor housing and a sensing element mounted in the sensor housing, and -- the reference unit comprises a reference housing and a sensor reference element mounted eccentrically in the reference housing; - inserting the reference unit into the first accommodation space with an insertion displacement direction (Z) perpendicular to said sensor orientation direction (X) and perpendicular to the plate-shaped support basis; - placing the sensor unit into the second accommodation space with an insertion displacement direction (Z) perpendicular to said sensor orientation direction (X) and perpendicular to the plate-shaped support basis; - adjusting the positioning of the sensor system by rotation of the reference housing about its corresponding rotation axis in the first round accommodation space ; - fixating the reference unit and the sensor unit in their corresponding accommodation spaces; <EOS>