Patent ID: 7805803

Claim:
A suction nozzle for a vacuum cleaner having at least one of a suction wand and a suction hose, the suction nozzle comprising: a nozzle part having a suction mouth; a tubular connection part configured to connect to at least one of the suction wand and the suction hose; a holding device having a receiving element and being disposed at the upper side of the connection part; a dust sensor disposed in a dust-air stream inside an upward portion of the connection part, the dust sensor being insertable underneath a housing of the connection part through an opening formed on an upper side of the connection part so as to protrude into the dust-air stream near an upper wall area of the connection part; an indicating device having indicating elements indicating a dust flow, the indicating elements being disposed in a receiving chamber formed at the upper side of the connection part; and an electronic control device configured to analyze signals of the dust sensor and controlling the indicating device during operation; wherein the dust sensor is a piezoelectric dust sensor disposed in the receiving element and protrudes at an angle into the dust-air stream and wherein the receiving element is insertable, together with the sensor, into an interior of the connection part through the opening.