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Abstract

A sensor for measuring the mean velocity of fluid flow in a conduit senses flow velocities at a number of locations across the interior of the conduit to yield an accurate mean flow signal. The sensor includes a tubular housing which extends across the interior of the conduit. An electromagnet is arranged in the housing and produces an electromagnetic field in the fluid, the axis of the field extending normal to the direction of fluid flow. A plurality of electrodes are arranged in spaced relation along the length of the housing and in diametrically opposed pairs on opposite sides of the housing. The lines which pass through each electrode pair are arranged perpendicular to the direction of fluid flow. The electrodes produce electrical signals in response to the flow of fluid through the field, with each signal being a function of the velocity of fluid flow adjacent each electrode. The signals are combined to produce the mean flow velocity output signal.

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First Claim