An electrode (10) for potential acquisition of a surface is provided. The electrode (10) comprises at least two pins (11a, 11b, 21) for contacting the surface, and a local signal processing unit (12) connected to at least one (11a, 11b) of the pins (11a, 11b, 21). The local signal processing unit (12) is configured to perform signal processing operations with respect to the corresponding surface potential signal of the respective at least one pin (11a, 11b). In addition to this, the local signal processing unit (12) is directly integrated into the electrode (10).