Diagram of LiDCO sensor

The flow-through cell is shown in green. The saline-filled wick (shown in orange) makes the electrical connection between the blood in the flow-through cell and the external reference electrode. The lithium-selective membrane (shown in red) is dip cast on the end of the polyurethane insert. The lumen of this insert is painted with silver/silver chloride paint as is the outside where shown (shaded grey).