Abstract: Apparatus for scraping metal coatings of hot-coated metal strips such as when hot-galvanizing a steel strip comprising scraping nozzles located above a metal bath and an X-ray fluorescent measuring device disposed downstream of the nozzles for adjusting the pressure at the nozzles in accordance with the measured thickness of the coating so that a pre-determined coating thickness is obtained. The measuring device is supported in a cooling chamber which allows the measuring device to be brought relatively close to the nozzles and a gaseous cooling medium is blown through further nozzles in the space within the chamber between the strip and the measuring device.