the controller shown earlier in this string is OK for a small container and a small batch of sausage but for larger batches I use either a 25 gallon crab pot or my 30 gallon rectangular tank. I don't use the digital controller any more as the Inkbird itc-308 digital temperature controller works just fine and is easier to use. You just plug your gas control valve into the controller and it works just fine. Here is a link to my video.
https://vimeo.com/244289220