Abstract: A controller for a beverage tap has a base with a fastener for attaching the base to the beverage tap. A pneumatically-operated cylinder is mounted on the base and has a piston which when the cylinder is pressurized forces a lever of the tap into an open position. A cover releasably extends around five sides of the base and encloses the cylinder. A torsion spring is attached inside the cover to bias the lever into a closed position when the cylinder is not pressurized. A plurality of push button switches are mounted on the cover for operating the controller. A first electrical connector is attached to the base and has two guides that have conical apertures. A second electrical connector is movably attached to the cover, and includes two pins located within apertures of the two guides. The first and second electrical connectors have contacts formed by a pair of tines. Each pair of tines of one electrical connector slide in between and mesh perpendicularly with a pair of tines of the other electrical connector.