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Weems & Plath Tamaya Marine Vane (Analog)

The KV-5020 marine wind vane/anemometer is for use on ocean-going vessels. It sends both wind direction and speed signals simultaneously from the transmitter for remote observation.  

The transmitter is a propeller/windmill type and is used in combination with the wind speed/direction indicator. The analog indicator receives and processes the transmitter signals to drive the pointers. 


  • Two-piece system – vane transmitter & analog indicator
  • Built-in NMEA(National Marine Electronics Association) output, indispensable for ocean-going vessels
  • VDR compatible
  • Stepping motor-driven pointers resistant to vibration offer a reliable indication
  • LED illumination with dimmer

Optional Add-Ons:

  • A digital indicator that accommodates signals of your choice
  • KV-5025 - Simplified vessel speed/course signal transmitter (using GPS/magnetometric sensor)
  • Additional indicators

Transmitter Specifications:

  • Type: Propeller
  • Wind Direction Detection: 8-bit optical encoder, serial signal output, 256 partition dial
  • Wind Speed Detection: brushless, non-contact system by optical pulse
  • Start Wind Speed/Direction: 2 m/s or less
  • Wind Speed Resistance: 90 m/s (in wind tunnel tests)

Measurement Ranges:

  • Wind Direction: all azimuths, 360 degrees
  • Wind Speed: 2 to 60 m/s

Measurement Accuracy:

  • Wind Direction: within +/- 5 degrees
  • Wind Speed: 10 m/s or less = within +/- 0.5 m/s | 10 m/s or more = within +/- 5%
  • Cable: 6-core shielded cable (not included)
  • Cable Connection Method: via terminal
  • Working Temperature Range: -20 to +50 degree C


  • Open Collector: 6p terminal system, 6 shafts sealed
  • Weight: 2.5kg/5lbs (approx.)
  • Dimensions: See attached drawing
  • Coating Color: Munsell 2.5 G7/2 semi-gloss

Indicator Specifications:

  • Type: analog
  • Measurement Range: all directions (0-360 degrees)
  • Wind Direction: relative wind direction (instantaneous) | indicating range = 0-360 degrees
  • Wind Speed: relative wind speed (instantaneous) | indicating range = 270 degrees (60 m/s) kt or m/s


  • Computation Type: CPU vector operation
  • Data Sampling Rate: 0.25 sec (wind speed & direction)
  • Data Processing: instantaneous, second smoothing
  • Lighting: LED (with dimmer)
  • Input Signal: Dedicated wind speed/direction signals (6 wire)
  • Wind Direction: 256 segments, 8-bit Gray code serial signal
  • Wind Speed: 24 pulses/revolution, serial current loop
  • Output Signal: RS-232 or RS422, serial current loop
  • Response Time: 2.4 seconds per 180 degrees (corresponding to 40m/s wind speed)
  • Connection: Terminal system, 6 shafts sealed (Cable not included)
  • Power Source: AC 87-264V, 47-440Hz

Ambient Conditions:

  • Working Temperature Range: -10 degrees C to +50 degrees C
  • Working Humidity Range: 20% to 95% (no condensation)
  • Outer Dimensions: 245H x 400W x 120D mm (9.65” x 15.75” x 472”) approx.
  • Coating Color: Munsell 2.5G7/2 semi-gloss

Optional Equipment:

  • Remote dimmer switch
  • KV-5025 absolute wind speed/direction indicator
  • Simplified vessel speed/course signal transmitter
  • Dimensions:
  • Weight: 7.5 kgs /16.53 lbs (approx.)
  • EAN Code:

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