<p>Agricultural harvesting machine (1) comprises an opto-electronic measuring device (19) arranged in front of a further processing device (12) for online measurement in the flow of harvested material. Preferred Features: The measuring device is arranged in a central region of a receiving and conveying device (3). A sensor for the measuring device is arranged under an optically transparent plate (20) below the flow of harvested material, in which the plate is in contact with the flow of harvested material.</p>
