The spray nozzle is made from brass and is fixed at the lower end of a plastic funnel. It is held in a bracket vertically above the center of the test specimen. The height of the center of the nozzle is 150 mm above the centre point of the test specimen. The apparatus is kept inside a plastic tray, which collects the sprayed water.
The various components are made from brass and plastics to give them a corrosion resistant finish.