WEATHER STATION The YOUNG Wind Sentry Anemometer and Vane are professional quality sensors suitable for a wide range of wind measurement applications. These economically priced sensors provide excellent sensitivity, corrosion resistance, and minimal parts count for easy maintenance. The anemometer uses three lightweight hemispherical cups to measure wind speed. Cup wheel rotation produces an AC frequency that is linearly proportional to wind speed. The vane employs a balanced vane assembly with vane position sensed by a long life precision potentiometer. Precision stainless steel ball bearings are used throughout. Specification Range: Wind Speed: 0-50 m/s (112 mph) Azimuth: 360° mech.,352° electrical (8° open) Accuracy: Wind Speed: ±0.5 m/s (1.1 mph) Wind Direction: ±5° Threshold*: Anemometer: 1.1 m/s (2.5 mph) Vane: 1.3 m/s (2.9 mph) at 10° Signal Output: Wind Speed Signal: AC sine wave, 1 pulse per rev. Wind Direction Signal: DC voltage from 10Kohm conductive plastic potentiometer, 1% linearity, life expectancy: 50 million revolutions.  Power Requirement: Potentiometer excitation 15 VDC max Dimensions: Overall height: 32 cm (12.6 in) Crossarm Length: 28cm (11.0 in) between instrument centers Vane length: 22 cm (8.7 in) Cup wheel diameter: 12 cm (4.7 in) Crossarm mounting: 34 mm (1.34 in) diameter (standard 1 inch pipe) Shipping Weight: (03002) 1.3 kg (3 lb)