Link chambers may be used for concentration of dialyzed samples or for size fractionation of samples using membranes of different MWCOs. As with unions, link chambers may also be connected to chambers without membranes to make a larger volume chamber. Each link chamber comes with one open end cap. Primary and secondary link chambers accept different size membranes at their junctions on either side facing the dialysis chamber or the link chamber cap.

• Primary link chamber: can be joined directly to a dialysis chamber on one end and joined to a cap or a secondary link chamber on the other end. Primary link chambers are available in a range of 50 to 1500µL volumes. The junction between a dialysis chamber and a Primary link chamber accepts a 15/16"" diameter membrane and the junction between a primary link chamber and a secondary link chamber or cap accepts an 11/16"" diameter membrane.
• Secondary link chamber: can be joined to a primary link chamber on one end and can be joined to a cap on the other end. Secondary link chambers are available in either 50 or 100µL volumes. The junction between a primary and secondary link chambers accepts an 11/16"" size membrane and the junction between a secondary link chamber and its cap accepts a 7/16"" diameter membrane.