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Bulk
material supplied from above passes a
constant-speed impeller wheel driven by a
three-phase current motor, diverting the ma-
terial radially. The tangential Coriolis force
acting on the wheel blades causes drive torque
changes in proportion to the flow rate sensed
by a load cell. Based on torque and speed,
the microcomputer Congrav® computes the
current flow rate, which is both displayed and
issued as a signal for recording or control of
a variable-speed upstream feeder (e.g. screw
feeder, rotary valve).
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