A covering device for a spark plug shaft of an internal combustion engine has a fastening element provided for mechanically fastening the covering device to a target system, the fastening element being configured to electrically conductively connect at least one electric conductor to the covering device andor the target system. The system further includes a processor coupled with the memory. The first tier may include, for example, a first server. A stationary communication module has a radio frequency receiver adapted to receive the second signal. This method can be used with immunoassays of various formats, including, but not limited to, dot blot and western blot assays, which utilize polyclonal antibodies, monoclonal antibodies, antibody fragments, receptors, natural and synthetic ligands and other entities.