Thayer Scale introduces the new MWF-OS Sanitary Open Construction Weigh Belt Feeder for processing of snack food, cereal, pasta, pet food and any other application where hygiene and ease of cleaning is important. The MWF-OS can provide either a “closed loop” gravimetric control of material feed rate or an “open loop” control for precise convey rate output and totalization of an uncontrolled or intermittent material supply. The MWF-OS Sanitary Weigh Belt Feeder has been designed forr handling a wide range of materials and densities; having excellent accuracy and stability; sanitary processing due to its all stainless steel construction; positive belt tracking, without the use of mechanical devices, thanks to a unique belt tracking system; easy access, with a low-maintenance design and no tools disassembly; durability and stability under harsh conditions; fast belt removal due to a cantilevered frame; and rigid scale support system provides exceptional stability, assuring accuracy without frequent re-calibration. Belt velocity is measured from the tail pulley, not the drive motor, providing a direct measurement of belt speed, which improves both measurement and control of the material. The load cell assembly can be easily removed, then reinstalled without re-calibration of the feeder.