Abstract: An electric heater (10) incorporates at least one heating element (20), at least one wall member (16) upstanding in the heater, and a device (42) is provided for detecting a cooking utensil (6) supported on an upper surface (4) of a cooking plate (2) overlying the heater. The device (42) includes at least one inductively-operating loop (44) of electrically conductive material having a plurality of portions (50, 52, 54) adapted to extend over and spaced from the at least one electric heating element (20) between fixed supporting regions (56, 58, 60, 62) on the at least one wall member (16). The at least one loop (44) of electrically conductive material is such that the plurality of portions (50, 52, 54) are substantially incapable of self-support as such at normal operating temperatures of the electric heater. The plurality of portions (50, 52, 54) are supported by elongate members (64, 66, 68) of heat-withstanding material.

Abstract: A temperature sensor assembly (30) is provided for an electrical heating arrangement (2). The temperature sensor assembly (30) includes a substrate (32) located in a heater (12). The substrate (32) has an upper surface (38) in contact with the lower surface (10) of a cooking plate (4). The upper and/or lower surface or surfaces (38, 66) of the substrate (32) is provided with a first temperature-sensitive resistance element (40) at a first region (42) of the substrate (32) proximate a peripheral region (34) of the heater. The upper (38) and/or lower (66) surface or surfaces of the substrate (32) is or are provided with a second temperature-sensitive resistance element (54; 54A; 54B) at a second region (56) of the substrate (32) proximate the central region (36) of the heater.