An innovative device for producing a double-layer pellet has been developed for the purpose of establishement of an accurate transport diagnostic system to measure particle transport both parallel and perpendicular to the magnetic field lines of magnetic confinement devices. The tracer particles are deposited by a double-layer pellet which consists of a small core as tracer of light atom such as lithium and the major outer layer of hydrogen isotope. For technical demonstration of the device to produce the double-layer pellet, we chose the cylindrical form of the pellet: the outer diameter of 3mm, the length of 3mm with the core diameter of 0.24mm.
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