The invention concerns a sensor device, of nanowire type, comprising at least one nanowire comprising a first conductive region and a second region in insulator material, this second region not occupying the entire thickness of the nanowire, and a current being able to circulate in the nanowire from one of its ends to the other. This apparatus is constituted in such a manner that the data obtained by writing the state of the internal bus, ant the time when the microcontroller is operated, into the internal bus monitoring unit is inputted to the data holding unit, or is sent to the external, via the interface unit for external communication. The two partial flows are then combined and produce a gaseous working substance flow with heat from the heat source. That way, the cleaning spray covers a swath of pipe surface, with a minimum overlap between passes, with no gaps in the cleaning. The subscriber or another entity may be billed for data quality or correction services as performed.