The innovative rotor spray technology enables an easy operation with high precision in 24/7 production lines and a low cost of ownership. Water- or oil-based liquids can be applied in an uncomplicated and contact-free manner. The rotors are individually supplied with the desired amount of liquid via specially designed throttles and a frequency-controlled pump. The constant rotor speed divides the liquid at the rotor edge by centrifugal force into uniform micro-droplets.