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Windspeed Ltd (Vector Instruments), 113 Marsh Road, RHYL, N. Wales, LL18 2AB, United Kingdom.
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 Saturday, June 15 2024  Home [arrow]  Products [arrow]  Windvanes [arrow]  W200G (Encoder) Search site:  

Latest Weather...
(Rhyl, N.Wales, UK)
Wind Speed:  8.0 mph
Wind Direction:  353 °
Air Temp.:  13.9 °C
Rel. Humidity:  75.1 %
Rain (last Hr):  0.0 mm
(updated at: 14:51 UTC)

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Celebrating more than 50 years manufacturing & servicing High Quality Vector Instruments Anemometers and Windvanes at Windspeed Ltd
W200G (Encoder/Gray-Code) Windvane
The W200G is a Windvane which uses a reed-switch/diode encoder to convert the wind direction as sensed by the position of the F20 Series Fin into a Gray-coded parallel digital output suitable for loggers/PLCs.

The reed-switch encoder offers the advantage of virtually zero power consumption together with good sensitivity at low wind speeds.

While the relatively coarse resolution of the encoder (16 sectors) precludes accurate instantaneous measurements, the random nature of wind fluctuations together with the oscilliatory response of the vane allows accurate determination of the average wind direction from multiple samples.

Construction is from anodised aluminium alloys and stainless steels for exposed parts. Combined with a hard plastic (upper) bearing and precision ball-race, the result is an instrument suitable for continuous exposure to the weather, with a long service interval.

A marine version (/WR) is available with enhanced body/fin sealing and a touching shaft-seal above the upper plastic bearing for extra protection against the elements. An anti-icing heater is also available as an option.

This windvane is Fixed Reference, that is to say that it must be aligned with north during installation and fixed in that position/orientation during operation. For mobile platforms or situations where the orentation of the platform is unknown (for example buoys at sea), a self-referencing windvane such as our SRW1G would be appropriate.

The output of this instrument is Gray-code which means that each sector generates a code (bit-pattern) where only one bit changes relative to the adjacent sectors (unlike binary where multiple bits could change). The purpose of this is to assist the measuring equipment in detecting noise, interference and errors.

The recommended mounting adaptors for use with this instrument are our type 405 and 405-1 series.

Note: The W200G is currently undergoing a redesign - please contact us for futher information.

Specification Highlights:

  • Threshold:
  • 0.3m/s (standard F20 fin)
  • Distance Constant:
  • 2.3m (standard)
  • Damping Ratio:
  • 0.15m +/- 25% (standard F20 fin)
  • Recovery Distance:
  • 0.51m +/1 10% (standard F20 fin)
  • Damped Natural Wavelength:
  • 3.4m (standard F20 fin)
  • Maximum Wind Speed:
  • over 75 m/s
  • Temperature Range:
  • -55°C to +70°C
  • Range:
  • 360° mechanical angle, continuous rotation allowed
  • Life:
  • Reed-switches rated in excess of 50 million operations (corresponds to over 10 years continuous exposure)
  • Operating Voltage Range:
  • 1V to 30V DC
  • Output Signal/Code:
  • 4-bit Gray Code (equivalent to 4 switch closures with a common positive line)
  • Output load/bit:
  • 35mA max (loads from outputs to 0V)
  • Number of sectors:
  • 16
  • Sector Angle:
  • 22.5°
  • Hysteresis:
  • +/-4°
  • Resolution:
  • 22.5° +/- 3°
  • Accuracy:
  • +/-3° obtainable following averaging (20° max. instantaneous error ref. to vane position).
  • Connections:
  • 6 wire screened cable. Screen insulated at instrument end, black connects to body. Red is common positive (supply), blus, green, yellow, white carry 4-bit gray code output data (lsb..msb).
  • Fin (Vane-Arm):
  • type F20 as standard.
  • Dimensions:
  • This instrument is constructed using our standard fin and windvane body design and dimensions.

  • Reliability & Safety
  • Specifications are correct at time of writing and may change without notice. Please contact us to confirm the latest specifications.
    Please call/email us if you would like access to additional product information, data and specification sheets for this product.
    Windspeed Ltd (Vector Instruments)
    Windspeed Limited (trading as Vector Instruments),
    113 Marsh Road, RHYL, North Wales, LL18 2AB, United Kingdom
    Tel: +44 (0) 1745 350700
    Website design and content is copyright (c) 2003-2024 Windspeed Limited (unless otherise stated). All trademarks are acknowledged.