The invention concerns a building component that is assembled from a plastic foam material and a reinforcement netting of a spatial structure being at least partly embedded in the foam material, in which the plastic foam material is provided with a layer of sand at the side where the reinforcement netting projects from the foam material. The meter either has a single display that can be pivoted to an orientation convenient for viewing, or it has dual displays mounted on separate surfaces of the meter’s housing. The front face is curved such that a tip end portion thereof is positioned forwardly in the rotational direction of the impeller relative to a root portion thereof.