[en] The defectoscope SWD-1 is composed of the following modules: (1) testing instruments; (2) test probe coils; (3)standard coil supports; (4) automatic paint-marking system. The defectoscope which is for non-destructive testing is on the principle of eddy current with encircling transit coils. It is preferably used for automatic testing non-ferro-magnetic metals in the manufactories for nuclear industry. The defectoscope SWD-1 has following special festures: (1) All kinds of metal wires, rods, tubes and sections can be tested. (2) the normal diameter of tested metal is from 1 to 36 mm, and maximum is 87 mm. Special test coils can be used for section materials. (3) The defects of metals are indicated by sounds, lamps or meters, and can precisely be positioned by automatic paint-marking system. (4) It is suitable for continuing production process with high efficiency