In-Process Measurement of Kinematic Viscosity

Viscosity is an important product property and a decisive measurement parameter in the production and quality supervision of petrochemical end products such as heating oils and lubricants and of their feedstocks. For the control of production processes, efficient and robust process analysers are required to measure the viscosities of such liquids. As to the determination method for viscosity, the primary norms for these petrochemical products (e.g. heating oil DIN 51603, diesel DIN EN 590, marine fuels ISO 8217) refer to standards describing capillary viscometers with a high temperature precision for the measurement of kinematic viscosity (e.g. ASTM D 445, ISO 3104 and DIN 51562-1). In order to achieve comparability, capillary viscometers are also applied in the production process.