Acquisition is controlled by one or more acquisition units according to the application requirements. The PV-300 system takes NDT of pressure vessel welds a step further by combining multielement ultrasound probes and multielement eddy current probes. The eddy current technology has been added to cover another inspection required by the code: surface inspection done by either magnetic particle testing or liquid penetrant testing. Eddy current testing offers many advantages over these two methods. The results are more accurate, and more rapidly obtained, and are kept on digital support for better traceability.