Here is a pick of a Brewhardware.com sight glass and thermometer combo in my BK. I love them, I also have one in my HLT. I have dip tubes in both.
And here is my 1/2"x50' IC, I added legs so it sits above my dip tube. I also used 1/2" rigid with 90* bends so I wasn't trying to make the bends myself and kink it. Got that from Coppertubingsales.com as a kit.