Instead of cutting apart a perfectly good Crock Pot this build will show you how to build a controller your appliance you can plug into. This modular approach means you do not need to buy a second appliance. If you have an old rice cooker in the cabinet you can make it a sous vide oven.
The tricky part of sous vide cooking is keeping the water at a precisely regulated temperature. Most cooking appliances have the ability to turn the heat down but regulating it with any accuracy is not possible without automation. Fortunately temperature controllers are not expensive and they are as easy to use as a regular oven. An eBay search for temperature controller 58 194 should give options under fifteen dollars ($15USD). Amazon also has the same controllers. The advantage these devices have over a dial on the side of a slow cooker is that the temperature controllers use a thermometer to monitor the temperature.
The versatility of these controllers is also impressive and since this build is being made very modular it is possible to use this appliance for things other than cooking, such as automating a window fan. A short list to get the brain gears turning is shown at the end of the instructions.
The goal of these instructions is to help you build a device that is highly functional, rugged, and looks good on your counter. All the wires are hidden away and sealed up so a few errant splashes from the sink are not cause for an emergency.
*Alternatives to these devices are given on the last page
The PVC enclosure will have three holes. The easiest to cut is the 7/8 inch hole for the cord-tight connector. The second easiest to cut is a rectangular hole for the receptacle. The most difficult to cut is the rectangular hole for the temperature controller.