Sensor arrangement for measuring electrical potentials

The invention relates to a sensor arrangement with sensitive electrical potential sensors (15). This can for example be arranged on an electrical machine (11) to identify dangerous potential differences for humans. the sensor (15) are advantageous according to the invention implemented as micromechanically produced units. Therefore, they need a little space and can be advantageously produced inexpensively in large quantities. Characterized close monitoring, for example, a housing (14) of an electrical machine is possible. By an evaluation device (20) a three-dimensional potential profile can be created.