Method for recording temperature profiles in food packages during microwave heating using a metallic data logger

摘要

The time/temperature history of a food tray or pouch heated by microwave energy applied through a waveguide can be accurately assessed on positioning and stabilizing a shielded data logger in an orientation where the base of the data logger is located generally close to zero depth (near the side wall) and the tip projects to the cold spot in the tray or pouch. A frame can be used to assure stability of orientation in a pouch while bracing can be used to assure stability in a tray. The properly configured food tray or pouch can serve as an accurate witness device for food items being processed in a similar manner under microwave heating for, e.g., sterilization or pasteurization.