Print / download the product sheetThe ball drop viscometer, EH101, is used to measure the kinematic viscosity, and thus to deduce the dynamic viscosity, for translucent liquids. The viscosity of a fluid characterizing its resistance to flow, it is considered that the study of the displacement of a body in a stationary liquid is identical to that of the flow of the fluid around this static body.
By measuring the falling speed of a spherical ball in a vertical tube filled with the fluid to be studied, it is possible to deduce the kinematic viscosity. Indeed, during the phase of uniform rectilinear motion, the different forces that apply to the ball, namely the gravity, the Archimedes thrust and the drag force related to the viscous friction, are in equilibrium.
