Advantages Of MPT:
1.Detects flaw below ¼” below surface.
- Detects flaw filled with foreign material.
- Detect defect below painted & platted surface.
- Immediate indication.
- Testing is possible up 300°C using dry powder.
- Indication can recorded.
Limitation of MPT :
1.Applicable to only ferromagnetic material only.
2.Limited depth of detection.
3.Depth & size is not indicated.
4.Sensitivity varies with surface roughness & position.
5.Sensitivity rapidly diminishes with depth.