Industrial fryers are an integral part of the food industry. They usually serve to deep-fry various products. They do so by immersing products into pre-heated vegetable or animal fat. They are equipped with temperature sensors, to ensure that the oil does not overheat. This ensures that they can be safely used for repeated preparation of multiple batches of finished products. They can be used for making potato chips, certain pastries (e.g. donuts), meatballs, fish, seafood, vegetables, foods in batter, etc.