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Abstract

A volumetric fluid flow sensing system includes a pole magnet armature in which the direction of reciprocation of the armature is co-linear with its magnetic axis and, includes a magnetic field sensor within magnetic communication with the magnetic axis for monitoring changes in the magnetic field strength of the magnetic axis. The system includes a housing which defines a path of fluid flow, including an inlet channel having the magnetic armature axially positioned therein, and having an outlet channel radially oriented relative to the axis of the input channel and in fluid communication with the input channel. Further, there is employed an axially positioned calibration spring having an axis in spring force relationship to the magnetic axis of the armature and located co-linearly with the magnetic axis of the armature, to define a point of equilibrium between the spring constant force of the spring and against the armature and that fluid force applied against an inlet channel side of the armature by the volumetric fluid flow to be measured by the fluid flow sensor.

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First Claim