With a method of controlling the flow in a flow system where a liquid flow contains a particle concentration, the liquid flow is surrounded by a carrier liquid. The liquid flow and carrier liquid are led into a central channel in which there is provided an observation area (4) where measurements of the...http://www.google.com.au/patents/US6675821?utm_source=gb-gplus-sharePatent US6675821 - Method of controlling the flow in a flow system
