Cup Counter Anemometer -HLSI
The Cup Counter Anemometer measures the run of wind past the Instrument over a period. The instrument consists of three semi-conical copper cups 127mm in diameter with beaded edges fixed to a central spider by three brass rods. The cups assembly is friction coupled to a vertical spindle, There is a small ball bearing at the top of the spindle and another ball bearing at the bottom. The cup wheel spindle is of stainless steel and connected worm gearing to a revolution counter mounted in a water proof housing. By observing the counter reading at the beginning and end of any period of interest the average wind speed during the interval can be calculated.