Abstract: A sensor for providing information on a vital parameter includes a mounter for attaching the sensor to a living being, a light source connected to the mounter to radiate light into a part of the body of the living being, and a light receiver connected to the mounter and implemented to receive part of the light to provide, in dependence on an intensity of the light received, a light intensity signal depending on the vital parameter. Additionally, the sensor includes an acceleration sensor connected to the mounter and implemented to provide an acceleration signal in dependence on an acceleration in at least one direction. The sensor is implemented to transfer the light intensity signal and the acceleration signal to a processor for a combining processing of the light intensity signal and the acceleration signal, or to generate the light intensity signal in dependence on the acceleration signal.