Even larger sample volumes are possible with this device. It images cells dynamically as they flow through a microfluidic channel past the image sensor. A “movie’ is captured as the cells flow and processed mathematically to derive cell count and density. Sample volume is limited only by how much time can be allocated for the test. An important application for this type of testing might be for monitoring HIV+patients. It is expected that this model will play significant role in global health and environmental monitoring.