Why is the temperature in the barrel of the frying machine higher than the temperature set on the instrument?

The temperature in the boiler drum of the cooking machine is higher than the temperature set by the instrument, which depends on the location of your temperature sensor. If the temperature you need is the temperature in the drum, it is recommended to put the temperature sensor in the drum. If your temperature sensor is placed on the outer wall, there will definitely be a temperature difference between the outer wall and the inner wall. Another point mainly depends on your heating method. Different heating methods will have temperature difference. I hope I can help you.