A motorized scanner for longitudinal (vertical) and latitudinal (horizontal) traversing in the space between two adjacent coiled tubes and circumferentially inspecting the exterior and interior of the tubes - namely economizer, super heater and reheater tubes in a steam generating water tube boiler for any service d...

A system 100 to detect change in electromagnetic waves 108 patterns in a metallic structure 102 can includes one or more exciter coils 104 to generates electromagnetic waves; and one or more detector coils 106 placed within a predefined distance from the one or more exciter coils 104 in a field of interest within th...