The cooktop has a cooking zone (2), at least one electric heating unit (7, 7') assigned to the cooking zone (2) and a device for detecting a metal pot on the cooking zone (2) and determining its size when the metal pot is resting on the cooking zone (2). The device for detecting the presence and advantageously...http://www.google.fr/patents/US6242721?utm_source=gb-gplus-shareBrevet US6242721 - Cooktop with a non-metallic hotplate
