Help with density measuring device

[stregoi]

Hi every one i hope someone can give me an idea how to achieve that. I am working for at school project, where i am trying to build a device that measure density of a multilayer object/enviroment. I am thinking to achieve that by measuring the axial force exerced while pushig the device inside the multilayer object.
But how exactly to do that, and what sensors i have to use - i cant really figure that out.
any one can help ?

[Kelly_Bramble]

So, density is equal to mass divided by volume.

Please describe what you are measuring in terms of mass and volume with this method..

[jboggs]

I understand the poster is a student. It sounds like what he is really trying to measure is viscosity. I recall that it took me a while to understand the difference between density and viscosity.

[stregoi]

Thanks guys for the answers, i figured out. i made it complicated for my self. i found an easier solution