Wire crackmeters

Wire displacement sensors are used to detect and control any movements that occur in landslides or in unstable rock masses. The tool essentially consists of a box containing a rotatory potentiometer and tensionator for the steel cable, and an anchor that has to be fixed at the second reference point. A steel cable is stretched with constant voltage between the two reference points of the instrument. The maximum length of the steel cable may be up to 10 metres.