A network of controllers for controlling and monitoring associated assay testing systems coupled to a remote monitoring unit for monitoring and controlling the controllers and/or the assay testing systems is disclosed. Each controller transmits a display image representing the status of the respective assay-testing system. The remote monitoring unit automatically detects if the number of display images from the controllers is greater than a threshold number of displayable, static thumbnail images and, when the threshold is exceeded, displays thumbnail images dynamically in a scrolling or streaming motion. The thumbnail images, whether static or dynamic, are updated in real-time or pseudo-real-time to reflect updated status of the assay testing systems.