A device and a method for monitoring a sensor for an exhaust-gas aftertreatment system, in particular a temperature sensor, are described. A plurality of transport members with screw and shaft portions, transport developing agent housed within the device in a longitudinal direction, and form a circulation path. Preferably, the process is performed with a tube milling tool having interchangeable milling or cutting heads. Edges of the receptacle and insert are chamfered in such a way as to prevent the pins of the connector from being damaged when an improper insertion is attempted. A charge multiplying horizontal shift register is electrically connected to one output of the charge directing switch. A second well region is formed in the substrate and with dopants of a second type to form third pn-junction with substrate.