Capillary viscometer and flow cups (orifice viscometers) The working principle of these instruments is based on the determination of the time needed for a standard volume of fluid to pass through a ...

Kinematic viscometers have historically been of the gravity-driven glass capillary type, as specified in ASTM D446, and directly measure kinematic viscosity following the ASTM D445 Test Method.

This article discusses how using the hand-held, solvent-free SpectroVisc Q3000 Series in the field delivers accurate kinematic viscosity measurements immediately, even when compared to conventional ...

When a force or stress is applied to a fluid, it flows, resulting in internal friction that resists the flow. Therefore, viscosity is defined as the internal friction of a fluid, or in other words, ...