If I understand the question right you ask what is the advantage of having temp compensator built in? The advantage is price. I have had to replace this on our plants Honeywell system and it is about $140.00 and the ph probes are $190.00 so I would say if the price is right and it is built in...
To reduce the noise in your DI is not going to be a cheap fix! We doubled the thickness of the pipe and insulated as well to get away from the screaming frequency, we had moderate success. This is the same approach we used on our natural gas line we went from scheduale 40 to 80 and insulated...
