The inductive contactless sensor is suitable for angular or linear position sensing.The mechanical robustness

insensitivity to electrical or magnetic fields as well as its mechanical tolerances makes the sensor suitable for harsh environment

such as the monitoring of implantable medical devices.The primary design task of a contactless inductive position sensor（CIPOS）is the design of its electromagnetic coupling system.A principle and realization of a CIPOS is described.By using the FEM simulation tool Ansoft Maxwell

design of CIPOS electromagnetic coupling system based on the principle is presented.A prototype is fabricated and tested

is confirmed the feasibility and reasonableness of the design.