"So far, it is mainly Loss in Weight feeders (LIW) that are used for this purpose, especially in the pharmaceutical industry, as they can handle smaller flow rates accurately enough. The mechanical concept of these is decades old and despite miniaturisation and improvements at detail level, the structural drawbacks remain a stumbling block for further development of Continuous Manufacturing."

1. Gravimetric
2. Loss-in-weight feeder
3. Powder blending