Wind Sensors / FT7 Series / Direct Mount – DM50

Digital

Analogue

The DM50 wind sensor fits directly onto a 50mm (outer diameter) pipe and reads wind speeds up to 75m/s. With superior corrosion resistance and lightning protection, the DM50 is a great choice for  wind turbines and a wide range of meteorological applications. For ease of alignment, the DM50 can be fitted using our special alignment collar and mounting tool. These are available as optional accessories.

WIND SPEED
0-75 m/s

HEIGHT
174 mm

OPERATING RANGE
40 to +85 °C

WEIGHT
535 g

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  • Measures wind speed, direction and temperature
  • No moving parts, maintenance free
  • Compact size and shape make it physically strong
  • Powered by Acu-Res® Technology – gives a signal 40dB stronger than other ultrasonics
  • Acu-Res® software automatically compensates for changes in air temperature, pressure and humidity
  • Hard anodised aluminium body is corrosion resistant to ISO9227 & IEC12944, corrosion class C5-M
  • Thermostatically controlled heating system – ideal for use in extreme environments
  • Fully-sealed and waterproof to IP66, IP67 and IPX6K
  • Shock-resistant, immune to vibration, electromagnetic interference and solar radiation
  • Operates at temperatures between -40°C and +85°C
  • Operates at altitudes up to 4000m
  • No exposed parts – resistant to bird attack
  • Low power usage – even when heated (180W maximum)
  • Wind speed can be output in m/s, km/h or knots
  • Mobile, easy to integrate – mounts directly to pipes with an outer diameter of 47.9mm – 51mm
  • Available with digital RS485HD or analogue 4-20mA interface
  • Individually calibrated in our wind tunnel, no-recalibration required
  • Calibration results traceable by serial number, report available upon request
  • Please note that the FT742-DM50 is still awaiting finalisation and therefore its product certification is still outstanding.
  • WIND SPEED
  • Range
  • Resolution
  • Accuracy
  • WIND DIRECTION
  • Range
  • Resolution
  • Accuracy (within ±10° datum)
  • ACOUSTIC TEMPERATURE
    (Digital sensors only)
  • Resolution
  • Accuracy
  • Under the following conditions:
  • Speed range
  • Operating range
  • Difference between air and sensor temperature
  • SENSOR PERFORMANCE
  • Measurement principle
  • Units of measure
  • Data update rate
  • Altitude
  • Temperature range
  • Humidity
  • Ingress protection
  • Heater settings
  • POWER REQUIREMENTS
  • Supply voltage
  • Supply current (heater off)
  • Supply current (heater on)
  • PHYSICAL
  • Sensor height
  • Sensor width max
  • Sensor weight
  • DIGITAL SENSOR
  • Interface
  • Data encoding
  • ANALOGUE SENSOR
  • Interface
 
  • WIND SPEED

  • Range

    0-75m/s

  • Resolution

    0.1m/s

  • Accuracy

    ±0.3m/s (0-16m/s)
    ±2% (16-40m/s)
    ±4% (40-75m/s)

  • WIND DIRECTION

  • Range

    0 to 360°

  • Resolution

  • Accuracy (within ±10° datum)

    4° RMS

  • ACOUSTIC TEMPERATURE
    (Digital sensors only)

  • Resolution

    0.1°C

  • Accuracy

    ±2°C

  • Under the following conditions:

  • Speed range

    5m/s - 60m/s

  • Operating range

    -20°C to +60°C

  • Difference between air and sensor temperature

    <10°C

  • SENSOR PERFORMANCE

  • Measurement principle

    Acoustic resonance

  • Units of measure

    m/s, km/h or knots

  • Data update rate

    Up to 10Hz

  • Altitude

    0-4000m operating range

  • Temperature range

    -40° to +85°C

  • Humidity

    0-100%

  • Ingress protection

    IP66, IP67 and IPX6K

  • Heater settings

    0° to 55°C

  • POWER REQUIREMENTS

  • Supply voltage

    12V to 30V DC (24V DC recommended). Supports 12V battery operation with reduced heater capacity

  • Supply current (heater off)

    ~31mA

  • Supply current (heater on)

    Limited to 4A (default), 6A (max)

  • PHYSICAL

  • Sensor height

    174mm

  • Sensor width max

    70mm

  • Sensor weight

    535g

  • DIGITAL SENSOR

  • Interface

    RS485 (half-duplex), galvanically isolated

  • Data encoding

    ASCII

  • ANALOGUE SENSOR

  • Interface

    4-20mA, galvanically isolated from power supply lines and case

FT742-A-DM50 High Speed Wind Sensor Analogue Direct Mount DM50

FT742-D-DM50 High Speed Wind Sensor Digital Direct Mount DM50

Environmental Tests

EN 60068-2-6: Sinusoidal Vibration
EN 60068-2-64: Random Vibration
EN 60068-2-27: Mechanical Shock
ISO 20653:2013: IPX6K
EN 60068-2-31: Drop

If you want to know more about FT wind sensors certification, visit the Product Certification page.