Malfunction of the counter-current flow inside tray columns by entrainment of the liquid phase to higher stages depends on operation parameters but also internal design. The article covers the impact of weir design in terms of triangular notched and picket fence weirs on entrainment above sieve trays. A capture tray enables collection and weighing of the entrained liquid, while an image-based measurement technique additionally observes the respective droplet regime. Experimental results identify lower entrainment rates in case of advancing weir heights and use of a picket fence design. Still, tray designers should preset the desired operation range, as advancing weir heights and picket fence design limit the liquid tray capacity. Furthermore, image analysis enables an extrapolation of the locally detected liquid to an integral entrainment rate for comparison with the conservative capture tray method, as calculated entrainment correlations do not meet the experimental data at each operating point.