Magnetic pipe sensor

An apparatus for monitoring corrosion in a pipe, the apparatus comprising:

• a plurality of sensor units configured to be arranged contiguously around the pipe such that plurality of sensor units are capable of fully surrounding the pipe;
• each of the plurality of sensor units comprising:
• an inner shell, an outer shell, and a magnetic sensor array;
• the magnetic sensor array is between the inner shell and the outer shell;
• the inner shell, the outer shell, and the magnetic sensor array have curved shapes that complements an outer surface of the pipe;
• the magnetic sensor array comprises a plurality of printed circuit board strips;
• and
• each of the plurality of printed circuit board strips comprises a plurality of magnetic sensors distributed along each of the plurality of the printed circuit board strips, wherein:
• the plurality of sensor units are maintained in contact with the pipe by at least one belt disposed around the plurality of sensor units to maintain the plurality of sensor units in a clamshell configuration around the pipe,
• each of the plurality of sensor units comprises at least one guide for the at least one belt on the outer shell;
• and
• each of the plurality of sensor units comprises at least one belt cover interfacing with the at least one guide.