With the latest digital electronic technology and microcomputer technology, this instrument can offer not only extremely convenient operation, but also reliable and stable high performance X3-I is designed with full digital, impedance display mode, multi frequencies and micro power The instrument case is made from light and wear-resistant material to make it sturdy and durable X3-I has high sensitivity for discontinuities of metal materials, such as cracks on copper pipe surface, puckers and scars of steel pipe, pits, scratches, wear scars, transverse fissures or separation layers etc The no-directional function is specially designed for weld inspection Besides the man-machine dialog and the special digital electronic balance technology, X3-I has a broad frequency range from 64Hz to 5MHz which is appropriate for inspection requrements of various metal materials Since designed with full digital technology, this instrument can create standard testing program for different size which can be used for future The selection of probe completely depends on users’ testing requirements