Abstract: A cup anemometer providing accurate wind speed measurement in a cost-effective configuration. A rotor of the anemometer, e.g. a single-piece molded rotor, may be assembled to a shaft using a cap. In some embodiments, the hub of the rotor and the cap provide symmetry in the area of the cups and arms of the rotor and/or the bottom of the hub and the top of the cap may be positioned above and below, respectively, the planes defined by the tops and bottoms, respectively, of cups of the rotor. In some embodiments, each of the of the cups may be generally conical having a cone angle of nominally 114 degrees and/or each of the arms of the rotor may have a front surface that is co-planar with a front surface of an associated one of the cups.

Abstract: A cup anemometer providing accurate wind speed measurement in a cost-effective configuration. A rotor of the anemometer, e.g. a single-piece molded rotor, may be assembled to a shaft using a cap. In some embodiments, the hub of the rotor and the cap provide symmetry in the area of the cups and arms of the rotor and/or the bottom of the hub and the top of the cap may be positioned above and below, respectively, the planes defined by the tops and bottoms, respectively, of cups of the rotor. In some embodiments, each of the of the cups may be generally conical having a cone angle of nominally 114 degrees and/or each of the arms of the rotor may have a front surface that is co-planar with a front surface of an associated one of the cups.