Device for nuclear magnetic resonance spectroscopy, wherein - the device comprises a magnet arrangement, configured to produce a magnetic probe field within a magnet field of view external to the magnet arrangement, wherein the magnet field of view is a spatial region, wherein the magnetic probe field fulfils predefined required or desired properties inside the magnet field of view; - the device comprises a coil arrangement, configured to generate an electromagnetic excitation field within a coil field of view, wherein the magnet field of view overlaps at least in part with the coil field of view such that the electromagnetic excitation field is generated at least in part within the magnet field of view; - the device comprises a control unit, configured to control the coil arrangement; - the device comprises a magnet adjustment arrangement, configured and arranged to modify at least one parameter of the magnet arrangement to change a spatial position of the magnet field of view, wherein the change of the spatial position of the magnet field of view is a change relative to the device or to a predefined reference frame which is rigidly connected to the device; - the device comprises an ultrasonic sensor system with an ultrasonic field of view; - the ultrasonic sensor system is mechanically coupled to the magnet arrangement to ensure a fixed spatial relation between the ultrasonic field of view and the magnet field of view, wherein the mechanical coupling is designed such that the ultrasonic field of view follows any movement of the magnet field of view and/or the device comprises an ultrasonic adjustment arrangement, configured and arranged to adjust the spatial relation between the ultrasonic sensor system and the magnet arrangement to ensure a fixed spatial relation between the ultrasonic field of view and the magnet field of view. - the device comprises a magnet arrangement, configured to produce a magnetic probe field within a magnet field of view external to the magnet arrangement, wherein the magnet field of view is a spatial region, wherein the magnetic probe field fulfils predefined required or desired properties inside the magnet field of view; - the device comprises a coil arrangement, configured to generate an electromagnetic excitation field within a coil field of view, wherein the magnet field of view overlaps at least in part with the coil field of view such that the electromagnetic excitation field is generated at least in part within the magnet field of view; - the device comprises a control unit, configured to control the coil arrangement; - the device comprises a magnet adjustment arrangement, configured and arranged to modify at least one parameter of the magnet arrangement to change a spatial position of the magnet field of view, wherein the change of the spatial position of the magnet field of view is a change relative to the device or to a predefined reference frame which is rigidly connected to the device; - the device comprises an ultrasonic sensor system with an ultrasonic field of view; - the ultrasonic sensor system is mechanically coupled to the magnet arrangement to ensure a fixed spatial relation between the ultrasonic field of view and the magnet field of view, wherein the mechanical coupling is designed such that the ultrasonic field of view follows any movement of the magnet field of view and/or the device comprises an ultrasonic adjustment arrangement, configured and arranged to adjust the spatial relation between the ultrasonic sensor system and the magnet arrangement to ensure a fixed spatial relation between the ultrasonic field of view and the magnet field of view.