Which is the best CS generator??? I'm SOOOO confused!!!

I have a CS generator, but after reading several posts here, I'm thouroghly confused!!!! Do they make a meter to tell what ppm your generator makes??? I need to make LARGE batches of it for dairy farming- I want to put it in the cows waterers, BUT, at the rate mine makes it, I could sit all day and make CS and not have enough!!! I would like one that has a meter so you can see when you're done, what concentration it is, and I would like one powerful enough that it can make large amounts. PLEASE HELP!!!! I'm SOOOOOOO confused!!!! Thanks! Tweet