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 a rotation speed of a component of an elevator, escalator, moving walkway or moving ramp, the component being rotatable about a rotation axis, and the arrangement comprising:

• the component or a measurement part attached to the component in a rotationally fixed manner, the component or the measurement part being rotationally unsymmetrical about the rotation axis;
• and
• an inductive sensor adjacent to the component or the measurement part, the inductive sensor being stationary in respect of the rotation axis of the component, the component or the measurement part having a surface that is shaped or positioned such that a distance from the surface to the inductive sensor changes as the component rotates about the rotation axis, and the inductive sensor being configured to generate different output signals corresponding to different angular positions of the component about the rotation axis.