The strain gauge device (20) comprises an elastic band (22), the strain of which is to be measured. The sensor (26) comprises at least one elongated measuring strand (38) changing resistivity in dependence of the strain of the band (22). The measuring strand (38) is mounted with pre-tension to the band (22) by means of a layer of glue disposed between the sensor (26) and the band (22). The equipment (10) for continually measuring the blood pressure of a user comprises at least one strain gauge device (20).
