ANEMOMETER, SIMPLE (0673) Useful for determination of low wind speeds. This Robinson's cup anemometer comprises 4 lightweight, plastic. hemispherical cups mounted at the end of lightweight metal spokes and attached to a central hub. The hub pivoted on metal shaft on top of a vertical support rod on a stable base and is capable of rotating freely about vertical axis. Three cups are black and one red to facilitate counting of rotations per unit time. Qty :