Weigh Feeders

A special type flow meter suited for powdered or granular solids is the weigh feeder. One of the most
common weigh feeder designs consists of a conveyor belt with a section supported by rollers coupled to
one or more load cells, such that a fixed length of the belt is continuously weighed:
The load cell measures the weight of a fixed-length belt section, yielding a figure of material weight per
linear distance on the belt. A tachometer (speed sensor) measures the speed of the belt. The product of
these two variables is the mass flow rate of solid material “through” the weigh feeder: