Do you have the contollers already, or is this just a general information question
about how to do it?
A couple suppliers I can think of off the top of my head are:
Red Lion and Acculex
The next thing you have to consider is are you running these things independently,
with a programmable logic controller, or a mainframe.
Any of these is possible.
More info on the product you have or plan to get, and how you intend to indicate and/or
control the process would help us help you.
