I just picked up my Stout tanks stuff today and had them add an extra 1/2" NPT port with thermowell to my bettle kettle just for my Auber's RTD 2.5" long probe. I plan on packing the thermowell with thermal grease and calling it good. After all, it's just a boil kettle and I figure I don't need it to be super quick to respond. I bought tri-clover RTD probes that will be mounted in instrument tees on the mash tun and HLT outlets as I do want those touching the precious liquids for precise control.
Irish Red Ale