STRAIN SENSOR AND A STRAIN MEASURING ASSEMBLY COMPRISING THE SENSOR

The invention is a strain sensor (1) and a strain measuring assembly comprising the sensor, which is particularly suitable for measuring strain in industrial applications. The strain sensor (1 ) comprises a sensor body (2) and at least one semiconductor strain gauge (3) comprising a strain gauge body and two conductive contacts of the strain gauge through which the semiconductor strain gauge (3) is attached to the sensor body (2). The sensor body (2) comprises a contact side for attachment to the measured surface and an outer side opposite the contact side. The contact side comprises a protuberant portion for contact with the measured surface and a recessed portion, on which the semiconductor strain gauge (3) is placed, wherein both conductive contacts of the strain gauge are brought to the outer side of the sensor body (2). The sensor body (2) can preferably be a printed circuit board provided on the contact side with recesses (4) for housing the strain gauges. To increase the resistance, the strain sensor (1) can for example be encapsulated by a covering material or provided with a metal case (10).