Abstract: A method and apparatus are proposed for measuring the mass of a pulsating medium flowing in a flow cross section, in particular for measuring the aspirated air mass of internal combustion engines. The apparatus includes a temperature-dependent measuring resistor, the temperature and/or resistance of which is regulated in accordance with the mass of flowing medium. The measurement signal representing the medium mass is influenceable in accordance with the flow direction by at least one first temperature-dependent indication resistor, whose resistance value can be ascertained by a resistance measuring circuit and can be compared with the resistance value, also ascertained by a resistance measuring circuit, of a second temperature-dependent indication resistor.