An example inspection robot may include a drive module structured to engage a top tube of a vertically arranged layer of tubes, at least one telescoping pole, and a lowering mechanism operationally coupled to the at least one telescoping pole and structured to selectively extend or retract the at least one telescoping pole, thereby providing a selected vertical position of a sensor carriage assembly. The sensor carriage assembly may be coupled to the at least one telescoping pole, and structured to accept at least one of a plurality of sensors.