High resolution elliptical gear flowmeter

A flow meter, comprising:

• a casing, having a central cavity, said central cavity in flow communication with an inlet and an outlet conduit for conducting a fluid into and out of the central cavity;
• first and second intermeshing toothed oval gears, respectively rotatably supported in the central cavity via a primary support shaft and a secondary support shaft, said primary and secondary support shaft supported in a bottom of the central cavity, said first oval gear having an upper surface provided with a protrusion, said oval first gear further having a magnet situated in an upper portion of the first oval gear and centered with respect to an axis of rotation of the first oval gear, and rotating concentrically with respect to the axis of rotation of the first gear, with at least a portion of the magnet embedded within said protrusion;
• and
• a cap for closing the central cavity, said cap having an interior cavity housing an electronic board with a sensor or magnetic encoder arranged at a base of the interior cavity, so that when the cap is placed on the casing of the flowmeter, the sensor or encoder is arranged above the magnet of the first gear, said cap further having a bottom surface with a zone of reduced thickness defining a lower recess arranged below the inner cavity of the cap, so that the protrusion of the first gear is received in said lower recess, so as to align and bring the magnet in close proximity with the sensor or encoder.