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(A) Schematic drawing of the experimental setup for using coverslip sensors on a spinning-disk confocal microscope in combination with a luminescence lifetime imaging camera system. The blue and red arrows indicate the light paths for imaging the O2 distribution. The dashed gray arrow shows the light path for confocal microscopy. (B) Schematic drawing of the imaging geometry when O2 coverslip sensors are used as a lid in a biofilm growth flow chamber.
