Radio Frequency Co. offers Macrowave Pasteurization Systems, designed for conveyorized applications of bagged or in bulk, dog biscuits, kibbles and other dry petfood products. In a Macrowave heating system, an RF generator creates an alternating electric field between two electrodes. The material to be treated is conveyed through an electrode array where alternating energy causes polar molecules in the material to continuously reorient them to face opposite poles much like the way bar magnets react in an alternating magnetic field. The friction resulting from this molecular movement causes the material to heat both rapidly and uniformly throughout its entire mass. The systems operate at 40MHz where the depth of penetration and uniformity of heating are optimized, thereby ensuring effective kill of and other harmful microbes, according to the company.