A sous-vide circulator is an electronic device—a stick that's about 12-inches in length, that precisely controls the temperature of a water bath. The water bath is what you cook your food in.

Thermo Scientific Precision digital circulating water bath are microprocessor controlled and combine simplicity with excellent temperature uniformity. Ideal for applications where temperature ...

Instead, sous vide cooks rely on the humble immersion circulator to ensure a consistent temperature in the water bath. My circulator is the older version of the $75 Instant Pot Accu Slim.