What is orifice viscometer?

An orifice viscometer is a device used to measure the viscosity of a fluid by observing the time it takes for a specific volume of the fluid to flow through a known orifice or opening under the influence of gravity. The viscosity is calculated based on the flow rate and the properties of the fluid, such as density. This type of viscometer is commonly used in laboratories and industries to assess the flow characteristics of various liquids. It is particularly useful for non-Newtonian fluids, where viscosity may change with shear rate.