jsc2023e010170 (1/30/2023) --- Overall view of the CapiSorb Visible System prototype with sorbent simulant liquid in N240 room 133B. The CapiSorb Visible System will be launched on SpaceX CRS-27 in March 2023 to the International Space Station to demonstrate a liquid sorbent-based system that leverages the advantages of liquid control through capillary action to remove carbon dioxide from crewed atmospheres...The CapiSorb Visible System, shown here preflight, is used to study visco-capillary control and passive transport of liquid while simulating a fluid loop representative of a liquid carbon dioxide sorbent scrubber. The CapiSorb Visible System investigation demonstrates a liquid control using capillary forces, over a range of properties that are characteristic of liquids which absorb carbon dioxide. Image courtesy of NASA's Ames Research Center.