Constructed of SS, Model MWF-OS sanitary open construction weigh belt feeder can handle wide range of materials and densities. It can provide closed-loop gravimetric control of material feed rate or open-loop control for precise convey rate output and totalization of uncontrolled or intermittent material supply. Belt velocity is measured from tail pulley, providing direct measurement of belt speed. Load cell assembly can be removed and reinstalled without recalibration of feeder.