Rheology is defined as “the study of flow and deformation of matter”.  A Rheometer is a device used to measure the way in which a liquid, suspension or slurry flows in response to applied forces. It is used for those fluids which cannot be defined by a single value of viscosity and therefore require more parameters to be set and measured than is the case for a viscometer.  It may be used to help characterize the hydrocarbons in a reservoir.

The Model R/S-SST Rheometer is considered a (Soft Solid Tester) Rheometer that measures data which relates to viscoelastic characteristics such as yield stress, yield modulus in gels, pastes, and liquid/semi-solid materials with suspended particles. Custom-designed vane spindles are used to accommodate specific fluids without compromising sample structure. It can also be used with coaxial cylinders for complete flow curve analysis. It works both in controlled shear rate mode and controlled shear stress mode.