The thickness of the oil is officially rated in Centi Poise "Cps". An other known and used American rating is WEIGHT "WT". What relationship is between them? Now I have Protech silicon oil 2500 cps, 5000 cps and 10000 cps. What actually oil thickness in wt?

The poise is the most commonly encountered unit of viscosity, often as the centipoise.

Viscosity is the property of a liquid that resists flowing, sort of internal friction. Molasses, for example, has a higher viscosity than water. One poise is the viscosity of a fluid that requires a shearing force of 1 dyne to move a square centimeter area of either of two parallel layers of fluid 1 centimeter apart with a velocity of 1 centimeter per second relative to the other layer, the space between the layers being filled with the fluid. One poise = 0.1 pascal-second = 0.1 poiseuille.


Im yet to find a graph that correlates the two in comperable units, ie centipoise VS wt ...

1 Centipoise is the viscosity of water

I have been researching this question and i think that the relevance of WT vs Centipoise is unique to the individual liquid. While WT is a dynamic of its mass as opposed to centipoise is a dynamic of its viscosity .. or something like that ..

I think the way WT is measured is by measuring how long it takes for a certain volume of fluid to flow through a hole or hose of a known diameter/length. I could be wrong but I think I read something like that somewhere.

Yeah i just cant find a comparrison that ties them together.. Id bother to guess that in this case 1 CPS is = to 1 unit WT

As far as I know there is no direct relationship and that makes perfect sence if the two methods to measure are so completely different.
From your description the definition of poise is a pure physics measurement where the errors of the equipment is nulled with calibration while measuring WT you would always have the measurement equipment adding its property to the result and therefore not giving a linear relationship.

[link=http://www.twf8.ws/new/vote.html]this might help answer the question[/link]

Check out the big brain on Brad ! nice answer man !