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Zahn viscosity flow cups.
Viscosity is determined by the time required for a definite volume of liquid to flow through the orifice.
Vtsyiqi 1 zahn cup stainless steel zhan viscosity cup with 1 zahn cup viscosity cup viscometer flow cup 1 brand new 44ml cup volume white.
Get it as soon as thu sep 24.
Also known as zahn cups these testers let you calculate viscosity based on the speed at which a liquid drains through a cup with a hole at the bottom.
The only forces at work are gravity causing the flow and the hole size and gauge of the cup.
Different cups have different shapes and hole sizes and because times too short or too long are unsuitable for any given viscosity there is an optimum cup with times in the 15 60s range.
Use the included formula to convert seconds.
The zahn viscosimeter is a bullet shaped corrosion resistant stainless steel cup with a precision drilled orifice.
Five sizes are available for use on very thin oils to extremely heavy mixtures 20 1200 centipoise.
The principle operation of a zahn cup is resistance to flow.
To determine viscosity dip the cup in a liquid until it is completely filled lift the cup out of the liquid and time how many seconds it takes for the liquid to drain out of the hole in the bottom.
A preset volume of fluid draining through a set hole size.
The size of the hole is in mm and a zahn 4 means a zahn cup with a 4mm hole.