A U.S. Patent for “Method & Apparatus for Continuous Automated Perfusion System Harvesting from In-Situ Filtration Probe” was awarded to Flownamics on November 7th, 2019. The present invention is anapparatus and method for determining fluid flow (e.g., sterile media flow, filtrate flow, etc.) through tubing is provided. The apparatus includes an air source, a flow valve, a first sensor, a second sensor, and a media tubing section extending between the first sensor and the second sensor. In operation, air from the air source is introduced by the flow valve into a fluid flow to create a lead line of fluid immediately following the introduced air… Learn More