An apparatus is provided for identifying a property value of a fluid which is to be measured, a method for operating such an apparatus, and a method for manufacturing such an apparatus. The apparatus encompasses: a measurement capacitor device bringable into contact with the fluid, the measurement capacitor device having a first electrode, a second electrode, a first dielectric layer, and a second dielectric layer; a first dielectric constant of the first dielectric layer being dependent, in a context of contact with the fluid, on the property of the fluid to be measured; a second dielectric constant of the second dielectric layer being substantially independent of the property of the fluid which is to be measured; a compensation capacitor device that has the second dielectric layer, a third electrode, and a fourth electrode; the compensation capacitor device connected in parallel, or connectable in parallel, with the measurement capacitor device.