Definitions for "LVDT"
linear variable differential transducer
An inductance element that produces an electrical output proportional to the displacement of a separate movable core; used to measure position.
an electromechanical transducer that produces an electrical output proportional to the displacement of a separate movable core
This has been taken from a paper prepared at University of Ca. in Berkeley. Good Overview of operation.
a transformer with a single primary winding and two identical secondary windings