NovaLynx Corporation________________________________________________________________________________
200-WS-02E
Page 5
December 2018
3.2
Wind Vane Details
Air movement (wind) impinging on the tail fin causes the wind vane to align with the wind direction.
Fluctuations in the wind direction are measured by the sensor as the aerodynamics of the
counterweight and the tail try to keep aligned to the path of the wind.
The wind vane is coupled to a 20K ohm single turn potentiometer. When connected to a well-regulated
voltage source the output voltage of the sensor is proportional to the wind direction and can be read
by a single-ended analog input channel.
There is a gap (“dead band”) of approximately 5 degrees between the ends of the resistive media in
the potentiometer. This gap is aligned to the North indicator on the body of the sensor.
Measurement Range
125 mph max (55.88 m/s max)
Speed Threshold
1.2 mph (0.5364 m/s)
Speed Constant
1.25 mph = 1 Hz (0.5588 m/s = 1 Hz)
Accuracy
1 mph (0.4470 m/s) or ±3%
Transducer Type
Reed switch, magnet activated
Maximum Rating
10 mA @ 50 V (ac or dc)
Turning Radius
4 inch (10.16 cm)
Measurement Range
0-360 degree azimuth
Potentiometer Gap
5 degree (approximate)
Accuracy
±3 degrees
Vane Threshold
1.2 mph (0.5364 m/s)
Distance Constant
1.5 feet (45.72 cm)
Time Constant
2 seconds
Damping Ratio
0.4
Transducer Type
20k ohm, 20% tolerance, 1% linearity, bushing type bearing
Maximum Rating
1/4 watt
Turning Radius
10.5 inch (26.67 cm)
Cable
40 feet (12 m), 5 conductor, 24 AWG, shielded, tinned leads
Mounting
1.07 inch diameter by 0.82 inch socket (27 mm dia x 21 mm)
(fits standard 3/4" pipe)
Assembled Dimensions
17 x 12 x 8 inches (43 x 30 x 20 cm)
Shipping Dimensions
10.5 x 6.75 x 6.25 inches (27 x 17 x 16 cm)
Weight / Shipping
2 lbs (0.9 kg) / 4 lbs (1.8 kg)
Anemometer Specification
Wind Vane Specification
Overall Specification
