Suppression of the Lİft-Off Variable :
Suppression of the Lİft-Off variable is accomplished by simply selecting a test point D so that the distances D-C and D-A are equal. Thus a slight change in lift-off will not afect the over all reading. Of course the test point selected could lie anywhere along the line D-E. If the test [...]

Eddy current, penetrating radar and other electromagnetic techniques are used to detect or measure flaws, bond or weld integrity, thickness, electrical conductivity, detect the presence of rebar or metals. Eddy current is the most widely applied electromagnetic NDT technique. The eddy current method is also useful in sorting alloys and verifying heat treatment. Eddy current [...]