Falling Ball Viscometer Method

Falling ball viscometer uses the simple - but precise - Höppler principle to measure the viscosity of Newtonian liquids by measuring the time required for a ball to fall under gravity through a sample-filled tube. The principle of the viscometer is to determine the falling time of a ball of known diameter and density through a close to vertical glass tube of known diameter and length, filled with the fluid to be tested. The viscosity of the sample liquid is related to the time it takes for the ball to pass a distance between two specified lines on the cylindrical tube. This method is particularly suitable for viscosity measurement of high viscosity samples at low shear rates.