Abstract: A device for wetting a carrier medium, such as a paper web, a material web, a nonwoven web or a woven fabric web or a knitted fabric web, is provided, having an injection unit consisting of a first elongate hollow element with an opening, preferably with a plurality of openings which are spaced apart from one another in the longitudinal direction, and of a pump which is connected to the elongate hollow element, pumps the wetting liquid through the elongate hollow element and through the opening or the openings, and, as a result, injects a single or multiple jet into the carrier medium.