A flowmeter including: - a pipe for measuring the flowrate of a fluid, said pipe extending along a longitudinal axis (10, 110), - at least one first ultrasound transducer (36, 37, 137, 136) and at least one second ultrasound transducer, said ultrasound transducers being mounted facing one another relative to a wall of said pipe, - at least one first housing (30, 130, 131) delimiting an internal volume to receive said first ultrasound transducer and at least one second housing delimiting an internal volume to receive said second ultrasound transducer, - lateral covers (39, 49, 138, 139) adapted to block the opening (32, 42) of each housing (30, 40, 130, 131), - at least one electronic circuit card electrically connected to the first ultrasound transducer (36, 37, 137, 136) and to the second ultrasound transducer, - a main receptacle (6, 106) including a main opening and a bottom, the concavity of said main receptacle being oriented away from a longitudinal axis of the pipe, said main receptacle delimiting an internal volume to receive said electronic circuit card, characterized in that it includes: - at least one first duct connecting the internal volume to receive said electronic circuit card of said receptacle to the internal volume to receive said first ultrasound transducer, the first duct being formed within the wall of said pipe, - at least one second duct connecting the internal volume to receive said electronic circuit card of said receptacle to the internal volume to receive said second ultrasound transducer, the second duct being formed within the wall of said pipe, - a packing material chosen in a group formed of thermoset resins, said packing material filling at least in part said internal volume to receive said first ultrasound transducer, said internal volume to receive said second ultrasound transducer, said first duct and said second duct, said packing material further filling at least in part said internal volume to receive said electronic circuit card. - a pipe for measuring the flowrate of a fluid, said pipe extending along a longitudinal axis (10, 110), - at least one first ultrasound transducer (36, 37, 137, 136) and at least one second ultrasound transducer, said ultrasound transducers being mounted facing one another relative to a wall of said pipe, - at least one first housing (30, 130, 131) delimiting an internal volume to receive said first ultrasound transducer and at least one second housing delimiting an internal volume to receive said second ultrasound transducer, - lateral covers (39, 49, 138, 139) adapted to block the opening (32, 42) of each housing (30, 40, 130, 131), - at least one electronic circuit card electrically connected to the first ultrasound transducer (36, 37, 137, 136) and to the second ultrasound transducer, - a main receptacle (6, 106) including a main opening and a bottom, the concavity of said main receptacle being oriented away from a longitudinal axis of the pipe, said main receptacle delimiting an internal volume to receive said electronic circuit card, - at least one first duct connecting the internal volume to receive said electronic circuit card of said receptacle to the internal volume to receive said first ultrasound transducer, the first duct being formed within the wall of said pipe, - at least one second duct connecting the internal volume to receive said electronic circuit card of said receptacle to the internal volume to receive said second ultrasound transducer, the second duct being formed within the wall of said pipe, - a packing material chosen in a group formed of thermoset resins, said packing material filling at least in part said internal volume to receive said first ultrasound transducer, said internal volume to receive said second ultrasound transducer, said first duct and said second duct, said packing material further filling at least in part said internal volume to receive said electronic circuit card.