Odometer and inspection and/or cleaning device

An odometer is provided for distance measurement in an inspection and/or cleaning device. The odometer includes a carrier provided for rolling on a surface, and which is arranged in a holder of the odometer so as to be rotatable about an axis of rotation. The carrier has a multiplicity of magnets arranged circumferentially around the axis of rotation. The odometer also includes a magnetic field sensor for generating signals produced through rotation of the magnets of the carriers.