VISCOSITY MEASUREMENT

Viscosity measurement and control has assumed great importance in the process industry. Though there are several different techniques for measuring this parameter, each appropriate to specific process conditions, selecting the right one is still difficult. The fundamental characteristic influencing the ease and effectiveness with which most industrial fluids flow is its viscosity. Any machine that operates over a wide temperature range must be able to accommodate the resultant variation in lubricant viscosity. This variation is characterized by a dimensionless number called the viscosity index. The higher the number, the less the change.