Wind Sensors / FT7 Series / Flat Front – FF

Analogue

Digital

The Flat Front wind sensor is designed for quick and easy installation against a metal bar. Designed to last for up to 20 years, even in an offshore environment, the FT702 model is used by turbine manufacturers around the world. The updated FT722 version reads speeds up to 50m/s and the FT742 reads speeds up to 75m/s. Highly resistant to electromagnetic and acoustic interference, it is also an ideal choice for smaller-scale wind turbines. For retrofit, it provides a single, compact solution to replacing an existing mechanical wind vane and anemometer wind measurement system. With no moving parts to wear out or degrade, turbine downtime is reduced, power output is increased and yaw control is more efficient.

WIND SPEED
0-75 m/s

HEIGHT
161 mm

OPERATING RANGE
40 to +85 °C

WEIGHT
320 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 C5M
  • Thermostatically controlled heating system – ideal for use in extreme environments
  • Fully-sealed and waterproof to IP66 and IP67
  • Shock-resistant, immune to vibration, electromagnetic interference and solar radiation
  • Operates at temperatures between -40°C and +85°C
  • Resists icing conditions to MIL-STD-810G
  • Operates at altitudes up to 4000m
  • No exposed parts – resistant to bird attack
  • Low power usage – even when heated
  • Wind speed can be output in m/s, km/h or knots
  • 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

  • WIND SPEED
  • Range
  • Resolution
  • Accuracy
  • WIND DIRECTION
  • Range
  • Resolution
  • Accuracy (within ±10° datum)
  • Accuracy (outside ±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
 
FT702-PM
  • FT702-FF

  • WIND SPEED

  • Range

    0-50m/s

  • Resolution

    0.1m/s

  • Accuracy

    ±0.5m/s (0-15m/s)
    ±4% (>15m/s)

  • WIND DIRECTION

  • Range

    0 to 360°

  • Resolution

  • Accuracy (within ±10° datum)

    ±2°

  • Accuracy (outside ±10° datum)

    ±4°

  • 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

    Acoustic resonance

  • Units of measure

    m/s, km/h or knots

  • Data update rate

    Up to 5Hz

  • Altitude

    0-4000m operating range

  • Temperature range

    -40° to +85°C

  • Humidity

    0-100%

  • Ingress protection

    IP67, EN 60529 (2000)

  • Heater settings

    0° to 55°C

  • POWER REQUIREMENTS

  • Supply voltage

    20V to 30V DC (24V DC nominal)

  • Supply current (heater off)

    ~30mA

  • Supply current (heater on)

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

  • PHYSICAL

  • Sensor height

    161mm

  • Sensor width max

    55mm

  • Sensor weight

    320g

  • DIGITAL SENSOR

  • Interface

    RS485 (half-duplex), galvanically isolated

  • Data encoding

    ASCII

  • ANALOGUE SENSOR

  • Interface

    4-20mA, galvanically isolated

FT722-PM
  • FT722-FF

  • WIND SPEED

  • Range

    0-50m/s

  • Resolution

    0.1m/s

  • Accuracy

    ±0.3m/s (0-16m/s)
    ±2% (16-40m/s)
    ±4% (40-50m/s)

  • WIND DIRECTION

  • Range

    0 to 360°

  • Resolution

  • Accuracy (within ±10° datum)

    2° RMS

  • Accuracy (outside ±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 and IP67

  • Heater settings

    0° to 55°C

  • POWER REQUIREMENTS

  • Supply voltage

    12V to 30V DC (24V DC nominal)

  • Supply current (heater off)

    ~31mA

  • Supply current (heater on)

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

  • PHYSICAL

  • Sensor height

    161mm

  • Sensor width max

    56mm

  • Sensor weight

    320g

  • DIGITAL SENSOR

  • Interface

    RS485 (half-duplex), galvanically isolated

  • Data encoding

    ASCII

  • ANALOGUE SENSOR

  • Interface

    4-20mA, galvanically isolated

FT742-PM
  • FT742-FF

  • 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)

    2° RMS

  • Accuracy (outside ±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 and IP67

  • Heater settings

    0° to 55°C

  • POWER REQUIREMENTS

  • Supply voltage

    12V to 30V DC (24V DC nominal)

  • Supply current (heater off)

    ~31mA

  • Supply current (heater on)

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

  • PHYSICAL

  • Sensor height

    161mm

  • Sensor width max

    56mm

  • Sensor weight

    320g

  • DIGITAL SENSOR

  • Interface

    RS485 (half-duplex), galvanically isolated

  • Data encoding

    ASCII

  • ANALOGUE SENSOR

  • Interface

    4-20mA, galvanically isolated

FT702LT/D-V22-FF Wind Sensor Analogue 4-20mA Flat Front
FT702LT-V22-FF Wind Sensor Digital RS485 Flat Front

FT722-A-FF Wind Sensor Analogue Flat Front
FT722-D-FF Wind Sensor Digital Flat Front

FT742-A-FF High Speed Wind Sensor Analogue Flat Front
FT742-D-FF High Speed Wind Sensor Digital Flat Front

Environmental Tests
*These certifications do not apply to the FT702-FF.

Cold: EN 60068-2-1
Dry Heat: EN 60068-2-2
Temperature Cycling: EN 60068-2-14
Cyclic Humidity: EN 60068-2-30
Stationary Humidity: EN 60068-2-78
Combined Temperature & Humidity*: EN 60068-2-38
Sinusoidal Vibration: EN 60068-2-6
Random Vibration: EN 60068-2-64
Mechanical Shock*: EN 60068-2-27
IP 6X Dust: EN 60529
IP X7 Immersion: EN 60529
Wind Blown Sand Test: DEF STAN 00-35 Issue 4
Corrosion: ISO 9227 & IEC12944
Solar Radiation: EN 60068-2-5
Altitude: EN 60068-2-13
Drop: EN 60068-2-31
Hail: EN 61215
Fog: DEF STAN 00-35
Rain: DEF STAN 00-35
Icing: MIL-STD-810G
HALT: HALT

EMC*
*These certifications do not apply to the FT702-FF.


EN 61000-6-3: Emission standard for residential, commercial and light-industrial environments
EN 61000-6-2: Immunity for Industrial Environments
EN 61000-4-2: Electrostatic discharge immunity test
EN 61000-4-3: Radiated, radio-frequency, electromagnetic field immunity test
EN 61000-4-4: Electrical fast transient/burst immunity test
EN 61000-4-5: Surge immunity test
EN 61000-4-6: Immunity to conducted disturbances, induced by RF fields
EN 61000-4-8: Power frequency magnetic field immunity test
EN 61000-4-9: Pulse magnetic field immunity test
EN 61000-4-10: Damped oscillatory magnetic field immunity test
EN 61000-4-29: Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests

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