Please clarify what you are looking for, since there is a big difference between a densitometer and a density meter. Your wording "based in conductance for copper slurries" does not make any sense. I can only assume you are looking for a density meter to measure the slurry in some copper mine. I cannot see that you would want to use a densitometer on a slurry since it is mainly used to measure the transparency of a material.
If not and I misunderstand, please rewrite your question with a bit more effort this time.
If you are looking for a normal density meter to measure the copper slurry, here is a good one you can look at. Just specify the inner lining material to the supplier yourself or tell them where you want to use it and they will recommend a lining material for your application.
I assume the reason for seeking a conductance type measurement is an informed one? That is to say, having considered the property you wish to measure, you have looked at how various other properties vary in order to identify the most appropriate indirect measurement?
For example, if you are looking for %concentration of the slurry you know that as concentration varies so do many other properties some of which may be readily measured with varying degrees of accuracy etc.