Solids flow meters measure and monitor the flow rate of bulk solids, powders, and grains. Solids flow meters are used extensively in chemical and plastics manufacturing, cement and aggregate processing, and food and pharmaceutical processing. They measure and weigh solid materials as they flow through manufacturing machinery at various stages. There are several different measurement methods used in solids flow meters, including impact plate, measuring or deflection chute, and coriolis technologies. Some solids flow meters also use microwaves to detect the motion of solids through pneumatic systems or gravity chutes and feeders. Solids flow meters or monitors determine if there is a blockage in the line or verify whether materials are moving at an expected processing rate.