The invention relates to an apparatus and a method for inspecting an elongated tube-like object. The apparatus comprises a body (1, 2) for moving along the elongated tube-like object by clamping the object; and a sensor frame (15, I5b, I5c) supporting one or more sensors (20) for measuring a state indication property. One or more one or more body-to-sensor-frame connections (39, 40, 43, 72b, 72c) connect the sensor frame (15, I5b, 15c) to the body (1, 2), wherein the one or more body-to-sensor-frame connections (39, 40, 43, 72b, 72c) are arranged to allow an adjustable relative position between the sensor frame and the body, while the sensor frame can position itself with respect to the tube.