YSI 3077 [603077] Flow Cell Kit. Installation of the YSI 3077 flow cell is easy. Simply thread the flow cell on to the probe module of the Pro Series dual port assembly, 5563 or the 600 XL/XLM. Once secure, water can be pumped to the flow cell with a user-supplied pump. Water enters through the bottom of the flow cell, and passes through a diffuser plate. The water will leave through an opening at the top of the cell. This design ensures that flow is distributed evenly through the cell, eliminating dead zones of no flow along the sides.