Abstract: A household appliance includes a treatment chamber for treating material, a pattern luminaire designed to radiate a light pattern into the treatment chamber, an image sensor directed into the treatment chamber for capturing the light pattern reflected from the treatment chamber, and a motor operably connected to the pattern luminaire for rotating the pattern luminaire into different angles of rotation so as to enable the household appliance to determine at least one item of contour information from material irradiated by the light pattern from at least two reflected light patterns associated with different ones of the angles of rotation of the pattern luminaire.

Abstract: A surface heater for a household appliance includes an electrically insulating insulation layer having a permittivity which changes as a function of temperature. At least one strip-shaped heat conductor is applied to the electrically insulating insulation layer, and at least one measuring electrode which is electrically insulated in relation to the at least one heat conductor is applied on a same side of the insulation layer as the heat conductor.