Zahn Cup

Zahn Cup
Product Code: UT-ZC

A Zahn cup is a viscosity measurement device widely used in the paint industry. It is a stainless steel cup with a tiny hole drilled in the center of the bottom of the cup. There is also a long handle attached to the sides. There are seven cup specifications, labeled Zahn cup #x, where x is the number from two through seven. Use large number cup sizes when viscosity is high, use low number cup sizes when viscosity is low.

The total length is 30cm , capacity is 45ml.



φ2mm / 20...85 cst


φ3mm / 35...200 cst


φ4mm / 180...600 cst


φ5mm / 250...1000 cst


φ6mm / 300...1500 cst


φ7mm / 600...2000 cst


To determine the viscosity of a liquid, the cup is dipped and completely filled with the substance. After lifting the cup out of the substance the user measures the time until the liquid streaming out of it breaks up, this is the corresponding "efflux time".