A device that warms and maintains water to an exact temperature for very long periods of time
Process
Ensure the water bath is regularly calibrated and checked, by comparing to a known good temp probe at more than 1 check point temperature.
Before commencing cooking, ensure that the water bath is at, or above, the required cooking temperature, and ensure there is sufficient water for the entire cooking time. Where possible use a solid cover for the water bath to help with evaporation and to prevent contamination.
If you are cooking a large amount of produce, then you may need to set the temperature above the desired point, to account for a drop in temperature when the cooking items are added to the water.
Once the cooking has completed, make sure the items are chilled as fast as possible, using iced water. The cooked food needs to be below 5ºC within 90.
Do not mix different food types in the same water bath, and change the water between differing items. Ensure the immersion circulator is regularly cleaned, especially between items that contain allergens.