Originally Posted by French Fries
DCarch, can you use any PID controller? Or do you need one that is specifically designed for sous-vide cooking? Can you recommend one by any chance? Thanks!
Number one, you should not try anything unless you understand electric power wiring and grounding. Or you will be cooked instead of the food.
PID controllers some have relay contact outputs, and some have power out for a solid state relay (SSR). You will need to set the fryer's thermostat to the highest temperature and plug the fryer into a PID controlled SSR and let the SSR to turn the heating element on and off.
The ones have only relay outputs will need a low DC voltage supply to drive a SSR.
Go on ebay, you will find a ton of PID controllers, make sure they come with a temperature sensor or you can buy the sensor separate (type K)
Buy a SSR rated high enough in wattage handling capacity (less than $10).