What does this device do?

One of the designs used to demonstrate the tool's capability in the 3DuF paper (https://www.nature.com/articles/s41598-019-45623-z). Originally from "Long-Term Monitoring of Bacteria Undergoing Programmed Population Control in a Microchemostat" (http://science.sciencemag.org/content/309/5731/137)

License:

Attribution: CC BY