Norcross Corp.:  This efflux test cup is designed for manually measuring the viscosity of hotter, thicker fluids than conventional Zahn or Shell cups. Featuring internal timing pins, a user dips the cup into any fluid up to 50,000 cps, regardless of temperature, and then measures the time it takes for the fluid to drain from pin to pin, rather than from the bottom. It measures laminar flow instead of the turbulent or transitional flow out the cup’s bottom. The cup is available with several different hole sizes to correspond with various viscosity ranges.