Abstract: The invention concerns a flowmeter including: pipe (2) for measuring the flowrate of a fluid, said pipe extending along a longitudinal axis (10, 110), a first ultrasound transducer (36, 37) and a second ultrasound transducer (46, 47) are mounted facing one another relative to a wall of said pipe, a first housing (30) and a second housing (40) each delimiting an internal volume to receive said first and second ultrasound transducers, respectively, at least one electronic circuit card (65), a main receptacle (6) to receive said electronic circuit card, a first duct (50) and a second duct connecting the internal volume to receive said electronic circuit card to the internal volumes to receive said first transducer and said second transducer, each duct being formed within the wall of said pipe. The invention also concerns a method of assembling a flowmeter of the above kind.

Abstract: The invention relates to a flow measurement method comprising a generation of successive cycles, each cycle comprising:—a step (35) in which an ultrasonic wave is emitted by a first ultrasonic transducer;—a step (36) in which said ultrasonic wave is received by a second ultrasonic transducer; and—a step (37) in which a propagation time of said ultrasonic wave from the first ultrasonic transducer to the second ultrasonic transducer is measured, the method being characterised in that a given cycle is separated from the preceding cycle by an intercycle duration, and in that a flow rate of the fluid is calculated from a difference between the propagation time of the given cycle and an average of the propagation time measured for the preceding cycle and that measured for the cycle following said given cycle.

Abstract: The invention concerns a flowmeter including: pipe (2) for measuring the flowrate of a fluid, said pipe extending along a longitudinal axis (10, 110), a first ultrasound transducer (36, 37) and a second ultrasound transducer (46, 47) are mounted facing one another relative to a wall of said pipe, a first housing (30) and a second housing (40) each delimiting an internal volume to receive said first and second ultrasound transducers, respectively, at least one electronic circuit card (65), a main receptacle (6) to receive said electronic circuit card, a first duct (50) and a second duct connecting the internal volume to receive said electronic circuit card to the internal volumes to receive said first transducer and said second transducer, each duct being formed within the wall of said pipe. The invention also concerns a method of assembling a flowmeter of the above kind.