What is the difference between a probe and a transducer in the context of ET?

In the context of Eddy Current Testing (ET), the distinction between a probe and a transducer is pivotal for understanding how the technique functions. A probe generates eddy currents within the test material, typically using an alternating current that passes through a coil. This generation of eddy currents is crucial for detecting flaws, thickness variations, and other material characteristics.

On the other hand, a transducer plays a significant role in converting the electromagnetic response from the material—specifically the changes in the induced eddy currents—into a readable signal that can be interpreted by the testing equipment. This conversion process allows for the quantification and visualization of the data obtained during the inspection, enabling accurate assessments of the material's condition.

This differentiation delineates the roles each component plays in the overall Eddy Current Testing process, highlighting that the probe is responsible for creating the necessary eddy currents, while the transducer handles the interpretation of the information obtained from that interaction.