Zahn Cups can be used to quickly measure the viscosity of liquids such as Paint, Ink, Varnishes, Syrup and Oil. They are produced according to ASTM D816, ASTM D1084,and ASTM D4212. The Stainless Steel Cups are molded precisely and the orifices are precision drilled using high-speed CNC drilling.
Each cup has a 12-inch loop handle to allow the cup to be dipped by hand into a liquid container. At the center of this handle is a finger-ring for holding the cup in a vertical position during use. Their orifice diameters are set at the factory for appropriate results with applicable NIST traceable Newtonian oils.
Every Zahn cup has its own coefficient “K”, which is marked on the cup body. (Fact Viscosity = Testing viscosity × K)
Volume of Cup ：44ml
Length of Handle ：40±0.1mm
Height of Cup ：58±0.1mm
Measurement Temp ：25℃±1℃
Details of each Zahn Cups
Details/Zahn cup
Zahn cup 1#
Zahn cup 2#
Zahn cup 3#
Zahn cup 4#
Zahn cup 5#
Orifice（cm/inches）
1.98/0.08
2.74/0.11
3.76/0.15
4.27/0.17
5.28/0.21
Zahn Range （sec）
33.5-80
20-80
20-75
20-80
20-80
Centistokes Range
5-56
21-231
146-848
222-1110
460-1840
Applications
Very Thin Oil
T
hin Oil，Paint
Lacquer
Medium Oil
Mixed Paint
Viscous Liquid and Mixtures
Very Viscous Mixtures
NOTE：
Both the Zahn Cups and the Iwata Cup are based on measuring the Flow of liquid in seconds. Hence, a precision stopwatch is required.
Results should be reported in Zahn-Seconds at a specified temperature for a particular cup. To convert Zahn-Seconds to centistokes, refer to ASTM D4212, D816, and D1084
Centistokes ×Specific Gravity= Centipoise
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