Wind Sensors / FT7 Series / Direct Mount – DM
FT742-DM ultrasonic wind sensor

Digital

Analogue

The Direct Mount wind sensor fits directly onto a 33.7mm OD pipe and reads wind speeds up to 75m/s. This makes it ideal for a wide range of meteorological applications.

WIND SPEED
0-75 m/s

HEIGHT
161 mm

OPERATING RANGE
40 to +85 °C

WEIGHT
380 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
  • Mobile, easy to integrate – mounts directly to pipes with an outer diameter of 33.2mm – 34mm
  • 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)
  • 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° RMS4

  • 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). 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

    161mm

  • Sensor width max

    56mm

  • Sensor weight

    380g

  • DIGITAL SENSOR

  • Interface

    RS485 (half-duplex), galvanically isolated

  • Data encoding

    ASCII

  • ANALOGUE SENSOR

  • Interface

    4-20mA, galvanically isolated

FT742-A-DM High Speed Wind Sensor Analogue Direct Mount
FT742-A-DM KIT-5 High Speed Wind Sensor Analogue Direct Mount with 5m cable

FT742-D-DM High Speed Wind Sensor Digital Direct Mount
FT742-D-DM KIT-5 High Speed Wind Sensor Digital Direct Mount with 5m cable

Environmental Tests

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

EMC

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.