Volumetric flow meter having a cartridge casing inserted in a duct with intermeshed rotors

A fluidic component comprising a cylindrical duct adapted to be traveled by a liquid flow along a main flow direction, in which there is fitted a volumetric flow meter, said volumetric flow meter comprising

• a casing comprising a base body and a cap cooperating to define a housing chamber, said housing chamber being on opposite sides delimited by a base plane formed in the base body and by a cap plane formed in the cap, wherein through the cap there is formed an inlet passage fluidically communicating with the housing chamber and extending orthogonally to the base plane, and wherein through a bottom of the base body there is formed an outlet passage fluidically communicating with the housing chamber and extending orthogonally to the base plane, wherein the cap is snap-fitted to the base body and wherein the casing is without a gasket between the base body and the cap,
• a pair of rotors rotatably mounted within the housing chamber, about respective rotation axes orthogonal to the base plane,
• at least one permanent magnet arranged on board of one of the rotors, and
• a magnetic sensor adapted to detect a rotational motion of the permanent magnet,
• wherein a liquid flow entering the inlet passage and exiting the outlet passage is able to cause the rotors to rotate within the housing chamber,
• wherein the magnetic sensor is able to provide an electric signal indicative of the volumetric flow rate of the liquid flow,
• wherein the volumetric flow meter is placed entirely inside the duct, and
• wherein, on a periphery of the casing, there is formed a sealing lip extending radially and axially outwards and engaging an inner surface of the duct,
• wherein the inlet passage and the outlet passage of the volumetric flow meter are arranged parallel to an extension direction of the duct, in such a way that the liquid flow is able to pass through the inlet passage and, respectively, the outlet passage along a direction parallel and concordant with the main flow direction in the duct.