An electrostatic precipitator for removing solid and liquid components from an aerosol, characterized by at least one high-voltage bar extending into the gas flow path by means of a high-voltage insulator seated on the other side of the gas flow path. The high-voltage insulator is seated in a bowl-like insulator housing connected to an electric potential, through which the aerosol does not flow. The high voltage bar having electrodes extends coaxially in a hollow cylindrical mesh or grid electrode mounted with a front face on a base plate for the insulation housing and connected to a reference potential. The electrodes form circumferentially evenly distributed gaps of the minimum width H. The mesh or grid electrode abuts or protrudes into a nozzle plate. The mesh or grid electrode(s) is/are completely enclosed by a porous collector, no more than over the length of the sleeve by completely around the circumference. The entire aerosol flow must flow through the porous collector.