1. Assembly of 4 probes, probe clamping arms can be disassembled unilateral manually;
2. Two horizontal bars can be folded to adjust curvature, manual adjustment can realize detection from 7 inch pipe to plate in direction of axial ;
3. Two horizontal bars can be rotated, manually adjust a pair of probe clamping arms can realize detection from 6 inch pipe to plate in direction of circumference;
4. Both sides have a brake device, scanner can stay at any position;
5. Inner water distribution device , save more space ;
6. Space of walking wheel adjustable, freely work on short work piece;
7. Clamp wedge for different size, strong adaptability;