Railmonitor has developed a system that contains of wireless sensors, that monitor particularly sensitive rail sections and they will tell when the railtrack and sleepers shift.

Article in TEKNISKFOKUS (in danish): Sensorer overvåger følsomme banestrækninger

Although Railmonitor currently focuses on tracks and sleepers, the Railmonitor system is applicable to a much wider area, such as monitoring changes in sheet pile walls, buildings and tunnels.