Saybolt universal viscosity

Saybolt Universal Viscosity (SUV) is a measure of the viscosity of a liquid, typically used for petroleum products and some other fluids. It is determined using the Saybolt viscometer, an apparatus designed to measure the time it takes for a specific volume of liquid to flow through a calibrated orifice at a specified temperature (typically 60°F or 15.6°C). The viscosity value is expressed in seconds and is referred to as Saybolt Universal Seconds (SUS).