Measurement arrangement and method of monitoring rotation speed of a component of an elevator, escalator, moving walkway or moving ramp

A measurement arrangement for measuring the rotation speed of a component of an elevator, escalator, moving walkway or moving ramp, wherein the component is rotatable about a rotation axis, the arrangement comprises an inductive sensor that is arranged stationary in respect of the rotation axis of the component and adjacent to the component or adjacent to a measurement part that is attached to the component in a rotationally fixed manner, and the component or the measurement part is configured as rotationally unsymmetrical about the rotation axis so that different angular positions of the component about the rotation axis generate different output signals in the inductive sensor.