Abstract: The invention relates to a method and to a device for determining the concentration of N gas components in a gas mixture which has at least N gas components, where N is greater than 2, wherein a sensor element (1) or multiple sensor elements (1) is/are brought to N?1 predefined temperature values for the purpose of determining temperature-dependent heat conductivities, and wherein the at least one sensor element (1) is brought at least to a minimum temperature value (Tmin) in a range from approximately 60° to approximately 350°, and to a maximum temperature value (Tmax) in a range of greater than approximately 350°.