A digital linear displacement transducer normally uses

Linear displacement transducer:

• A displacement transducer is an electrical transducer used in measuring linear position. Linear displacement is the movement of an object in one direction along a single axis. Measuring displacement indicates the direction of motion.
• Linear displacement transducers work on the magnetostrictive principle.
• A torsional strain pulse is induced in a specially designed magnetostrictive waveguide by the momentary interaction of two magnetic fields.
• The interaction between these two magnetic fields (one from the moving magnet and one passing along the outside of the transducer) produces a strain pulse which travels at sonic speed along the sensor waveguide until the pulse is detected at the head of the transducer where the electronics are embedded.
• A digital displacement transducer to provide a digital output, linear, related to the displacement of a reference surface of an object.
• A digital linear displacement transducer normally uses Gray code.