A compact, entry-level piece of equipment for visualising flow patterns around weirs and other objects in an open channel. A range of models supplied in the package makes this an ideal product for introducing students to flow visualisation in fluid mechanics. The channel is fitted with dye injectors enabling the details of flow to be easily demonstrated and observed through streamlines. The apparatus consists of a robust stainless steel settling tank that reduces turbulence, fl owing into a 15 mm wide flow channel fabricated from transparent acrylic, together with various models, gates, weirs and hydrofoils.