The powder feeder in gas-dynamic cold spraying technology is a device responsible for precise dosing and feeding of metal powder into the gas stream. Its main task is to ensure the even introduction of particles into the Laval nozzle, where they are accelerated and directed to the surface. The quality of the feeder's work determines the stability of the coating and the efficiency of the entire spraying process. By regulating the powder feed, the thickness and uniformity of the applied layer can be controlled.