Displacement and the location of the object is moving in the movement process about the amount of displacement sensor 

Displacement sensor 

Displacement measurement method involves the range is quite broad. Usually use strain type, inductive, small displacement differential transformer type, eddy current type, hall sensor to detect, big displacement inductosyn is commonly used, grating, grid, and the magnetic grid sensor technology to measure. The grating sensor for easy implementation, high precision digital (currently the highest resolution can reach nanoscale), strong anti-interference ability, no one reading error, easy installation, use and reliable, in the machine tool processing, instrumentation and other industries are widely used.