cupandvane

Cupandvane is a compact wind measurement device that combines a cup-type anemometer with a wind vane to provide simultaneous wind speed and direction data. It is used in meteorological work, environmental monitoring, and portable weather stations where a single sensor package is desirable.

The device typically features three or four cups mounted on a low-friction axle to rotate in response to wind, paired with a directional vane that aligns the sensor toward the wind. The rotation rate of the cup rotor is proportional to wind speed within its calibration range, while the vane provides real-time directional information. Modern implementations may integrate magnetic or optical encoders and a small processor to convert rotor speed and vane angle into standard wind measurements.

Construction tends to emphasize light, weather-resistant materials, and reliable bearings. Readouts are commonly provided via analog or digital interfaces, and some units include self-contained data logging. Calibration is performed against known wind speeds and directions, and routine maintenance typically involves cleaning, lubrication of bearings, and periodic recalibration to account for wear or installation changes.

Applications include fixed meteorological stations, climate research, agricultural monitoring, and sensor payloads for unmanned systems. Cupandvane sensors are valued for their simplicity, robustness, and ease of installation, offering an integrated solution for basic wind profiling. Limitations include sensitivity to turbulent flow, icing, and mounting conditions that can affect accuracy; accurate data often require proper siting and regular maintenance. See also cup anemometer and wind vane for related measurement technologies.