I bought the Instant Pot Ultra to use both as a second Instant Pot but, more importantly, so I could cook sous vide. The Ultra has a custom temperature control in the Ultra cooking mode that allows you to set the temperature you want (good to within plus or minus 5 degrees).
Unfortunately, it’s not intuitively obvious how to set it. Since I figured there are other folks out there who are probably scratching their heads like I was over this, I made a quick little “how-to” video. Enjoy!