A method for fabricating a microelectronic circuit having an improved electrically conductive element. In a space 11 existing between the meter body 2 and the measuring chamber 7, the meter has means 13 for creating a swirling stream of liquid and means 14 for confining particles present in the liquid. Other embodiments are also disclosed. A heating element may be used to heat the air flow. The label is one formed from a tubular material which comprises as a base a heat-shrinkable film thermally shrinking mainly in the film width direction and which has been cut according to an object to be packaged, both edges in the film width direction having been bonded to each other.