Easily measure viscosity using an EZ™ Zahn viscosity dip cup and a stopwatch. Simply fill the cup by immersing it in the test liquid, withdraw and measure the time it takes until the first break in the liquid stream.

The new EZ™ Zahn Viscosity Cup Series is a logical and necessary outgrowth of the standardization studies on the Zahn Signature and similar cups for the promotion of this most popular type of viscosity measuring instrument as a national and international standard. Not only has this cup been improved with respect to earlier produced cups and designed to comply to the requirements of ASTM D 4212 but, in addition, each EZ™ Zahn Cup is furnished with a table which permits conversion between efflux time in seconds to the nearest tenth of a second to viscosity in centistokes. This table is particularly useful in determining efflux time in seconds when viscosity in centistokes is known.

• 3% guaranteed tolerance
• All stainless steel cup and handle
• The finest, most reliable, calibrated & documented cup on the market
• Complies With & Exceeds ASTM D 4212

• EZ Cup orifices are machined rather than drilled to insure exact centering in the cup hemisphere base and a minimum of burr formation. This insures an orifice of specified length and a correct symmetrical efflux stream
• The EZ Cup support rods are offset from the side of the cup and secured to the cup sidewall below the cup rim. This eliminates errors due to test material drainage from support surfaces
• The increased separation width of the support rods by over 20% and the lowering of weld to the cup provide best possible conditions for cleaning

The EZ™ cups are produced to very close mechanical tolerance in elaborate jigs and fixtures. Such equipment not only insures that each cup is correctly produced but also that all cups are identical. All parts of the cup are of stainless steel except for the name plate. The following table provides operating range specifications, cup midrange sensitivity and recommended calibrating oils. Following this table are graphs and mathematical formulas that relate efflux time in seconds to centistoke viscosity.

For those users who require documented certification of their measuring equipment, the EZ™ cups are available with a Certificate of Calibration. This document contains not only information on actual cup calibration with standard oils traceable to the National Institute of Standards and Technology but in addition, this certification also complies to conditions and procedures under the requirements of ANSI/NCSL Z54O-1 or MIL-STD-45662A as applicable.