The image heating apparatus includes an endless belt, a roller which contacts an outer face of the belt, and a nip portion forming unit which contacts an inner face of the belt, and forms a nip portion with the roller, for nipping and conveying a recording material. A wire connecting box has two ears arranged at two edges thereof. The common electrode has thin film sections at the individual sections and a thick film section at the base section, and the film thickness gradually increases from the thin film sections towards the thick film section in a region between the thin film sections and the thick film section. From a customer system, the personal account data associated with the customer is received, which is encrypted with the encryption key. Also described is the method for the determination of the concentration of organometallic compounds by the on line use of a sensor as above defined. A display includes an electrode recessed in a floor of a pixel well.