Accessory set Anelli di de Nouy

De Nouy rings and Wilhelmy plates are instruments used to measure the surface tension of a liquid. Surface tension is the force along the surface of a liquid, trying to minimize its area. De Nouy rings consist of a thin ring immersed in liquid, while Wilhelmy plates consist of a solid plate or filament immersed in liquid, and surface tension affects the height of the liquid on the object.