Abstract: When using a Bobbin probe for eddy current testing of condenser heat transfer tubes, there is a blind spot problem in the near pipe area. Therefore, visual inspection of the near pipe area is often required during the in-service inspection stage. However, it is difficult to quantify the depth of surface opening defects found. Therefore, a surface array eddy current testing experiment was conducted on the near pipe area of condenser heat transfer tubes. The experiment showed that by customizing the fixture, the probe could be closely attached to the inspected surface to obtain good detection stability. This technology could detect surface opening defects with a depth of at least 0.1 mm and a width of 0.13 mm, and the depth equivalent could be given through the "amplitude-damage depth" method, which provided a reference for subsequent defect evaluation and treatment.