How does cooking with an immersion circulator work?

by | Aug 4, 2009 08:00 AM ET

You Asked:

How does cooking with an immersion circulator work? --- Brett, Marrero, La.

Marshall Brain Answered:

An immersion cooker is basically a water pump combined with a heating element and a precise thermostat. When you stick the immersion circulator in a pot or vat of water, the water can be kept at a carefully controlled temperature.

You can see an immersion circulator at work in this video:

Immersion circulators are often used in Sous Vide cooking, where the food is vacuum-sealed in a plastic bag and heated, like this:

In the following video, rib steaks cook at 131 degrees F for two hours before grilling:

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