A system and method for simulating the flow of a viscoelastic fluid through a channel. The rolled profiles have a constant profile shape with a bottom leg and a top leg, which are angled outwards in the assembled state, and an intermediate leg being provided with an offset for supporting and welding at least one intermediate plate. Thus, the magnitude of the current flowing through the measurement resistor is correctly measured without being influenced by the parasitic resistances of the terminals or of the test probe used. The delivery device can include a tip member coupled to the distal end of a catheter. This invention also relates to methods for producing other wheat varieties or breeding lines derived from wheat variety W980052N1 and to wheat varieties or breeding lines produced by those methods.