Calibrated EZ® Viscosity Cups
These "Equivalent Zahn" viscosity cups from Paul N. Gardner Co., Inc. meet ASTM D4212 drain time specifications. They are also compatible with ASTM D1084 and ASTM D816. Machined orifices are essentially burr-free and exactly centered in the cup hemisphere, ensuring uniform orifice geometry and minimum cup to cup shear rate variability. Handles are offset from the side of the cup and secured below the rim, eliminating errors due to drainage from the support surfaces. The precision workmanship and unique design allow calibration tolerances within 3%. Cup and handle are 100% stainless steel.
Each cup is supplied with a conversion chart for drain time in seconds vs. viscosity in centistokes.
Use the appropriate calibration oils to assure continued accuracy. Never use silicone-based oils to calibrate viscosity cups; they leave a residue that alters performance. EZ® cups qualify for certification under the requirements of MIL STD 45662A or ANSI/NCSL Z540-1. Please call for more information about cups with calibration certificate.
Cup No. Time in Secs Centistoke Range Midrange Sensitivity¹ Calibration Oil No.²
1 40 to 60 10 to 36 1.3 G-10/19
2 20 to 60 19 to 156 3.3 G-60/117
3 12 to 60 64 to 596 10.5 G-200/458
4 10 to 60 79 to 784 13.9 G-200/458
5 10 to 60 161 to 1401 24.2 G-350/878
¹ Stated as centistokes per second of efflux time.
² Centistoke values are nominal - actual values printed on labels