Improved PPG measurement Device for measuring a photoplethysmogram (PPG) of a tissue: a tissue contact surface (2) for contact by the tissue; a plurality of light emitter units (6) for emitting light in the tissue contact surface (2) with at least three light emitter units (6); a plurality of photodetectors (7) for detecting in the tissue contact surface (2) the light emitted by the light emitter units (6) with at least three photodetectors (7); a signal unit for measuring PPG signals of different optical paths provided by all possible pairs of light emitter units (6) and photodetectors (7)