The present invention relates to a device, containing a first sensor, designed and arranged for sensing a first measurement variable of a fluid, and a second sensor, designed and arranged for sensing a second measurement variable of the fluid, a first electrode assembly has a substrate and a first planar electrode overlying the substrate. A second electrode assembly has a second planar electrode. The first planar electrode and the second planar electrode are dielectrically spaced apart from each other. The first electrode assembly and the second electrode assembly form a first capacitor as the first sensor such that a first capacitance, formed by the first planar electrode and the second planar electrode, can be varied under the influence of a fluid and in accordance with a flow velocity of the fluid as the first measurement variable.