Burrell Scientific 073-851-20-00 Severs Extrusion Rheometer, Model A-120, White

The Burrell Scientific 073-851-20-00 Severs extrusion rheometer has a 1 to 1 million centipoise (cP) viscosity measuring range for use with fluids that will flow at room temperature, with or without the application of pressure. It measures the working properties of fluids and the effects of pressure, time, agitation, and changes in composition. The rheometer has a 0.30cm stainless steel orifice for durability. It has a pressure gauge to measure line pressure and another to measure sample pressure up to 100 psi in one-pound increments. This Severs extrusion rheometer includes one sample cylinder and is suitable for use in the formulation, manufacture, and end use of printing inks, coatings, adhesives, polymers, food pastes, lubricants, plastisols, paints, paper, putty, cosmetics, soaps, waxes, asphalts, and mastics.

A viscometer, also called a viscosimeter, is an instrument used to measure the friction caused by the relative motion of a Newtonian fluid and a known surface, and is usually expressed in units of poise (P), centipoise (cP), pascal seconds (Pa s), and millipascal seconds (mPa s). Viscometers have several forms, including but not limited to falling ball, rotational, vibrating, capillary, funnel, and bubble. A falling ball viscometer measures the time it takes for a ball of known diameter and density to fall through fluid in a cylinder of known diameter. A rotational viscometer measures the force required to stir a fluid. A vibrating viscometer measures the power input necessary to keep the oscillator vibrating at constant amplitude while immersed in a fluid. A capillary viscometer has a narrow-bore vertical section with two printed marks that measure time required for a known volume of fluid to fall a known distance. A funnel viscometer, such as a Ford, Zahn, or Shell cup, measures the time it takes a known volume of fluid to flow from the base of a cone through a short tube. A bubble viscometer measures the time required for