A printing system includes first and second marking engines in series which each include an image applying component for applying an image to print media and a fixing device for at least partially fixing the applied image. The substrate is formed from a support member having a substantially planar surface, and first, second, and third electrically conductive paths. The canister is of simple construction that is mounted in a hollow and is removable and interchangeable for easy upgrading and repair of the bathing system. The thermometer value is inverted to the X-array but remains uninverted on the Y array.