Wind Sensors / FT7 Series / Surface Mount – SM

FT742-SM ultrasonic wind sensorFT742-SM ultrasonic wind sensor

The FT742 Surface Mount wind sensor is designed for OEM integration. It has an electronic compass and a thermostatic heater. The sensor has been integrated into UAVs, drones, military vehicles, autonomous robots, handheld weather stations, drifter buoys, vehicle-mounted and ship-based meteorological systems. The sensor can be installed to ensure alignment with a standard reference, typically Magnetic North, or the integrated compass can calculate this automatically. Small, low power and extremely rugged, the FT742-SM is extensively tested and certified for vibration and shock resistance, and RF immunity.

WIND SPEED
0-75 m/s

HEIGHT
71.2 mm

OPERATING RANGE
40 to +85 °C

WEIGHT
252 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 tunnel checked before despatch, no-recalibration required
  • Wind speed can be output in m/s, km/h or knots
  • Available with digital RS485HD interface
  • DIMENSIONS
  • Sensor height
  • Sensor width max
  • Mounting surface to cavity centre
  • Recommended mounting surface hole
  • WIND SPEED
    km/h & knots only available when operating the sensor in NMEA 0183 mode.
  • Range
  • Resolution
  • Accuracy
  • WIND DIRECTION
  • Range
  • Resolution
  • Accuracy (within ±10° datum)
  • Accuracy (outside ±10° datum)
  • ACOUSTIC TEMPERATURE
  • Resolution
  • Accuracy
  • Under the following conditions:
  • Speed Range
  • Operating Range
  • Temperature Difference
    between the air temperature and the actual temperature of the sensor
  • SENSOR PERFORMANCE
  • Measurement principle
  • Units of measure
  • Altitude
  • Temperature range
  • Humidity
  • Ingress protection
  • Heater settings
  • POWER REQUIREMENTS
  • Supply voltage
  • Supply current (heater off)
  • Supply current (heater on)
  • Power consumption with heater disabled (for battery use):
  • PHYSICAL
  • I/O connector
  • Sensor weight
  • DIGITAL SENSOR
  • Interface
  • Format
  • Data update rate
  • Error handling
  • Overspeed Warning
 
  • DIMENSIONS

  • Sensor height

    71.2mm

  • Sensor width max

    56mm

  • Mounting surface to cavity centre

    32.9mm

  • Recommended mounting surface hole

    24mm

  • WIND SPEED
    km/h & knots only available when operating the sensor in NMEA 0183 mode.

  • Range

    0-75m/s | 0-270km/h | 0-145.8 knots

  • Resolution

    0.1m/s | 0.1km/h | 0.1knots

  • 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

  • Accuracy (outside ±10° datum)

    5° RMS

  • ACOUSTIC TEMPERATURE

  • Resolution

    0.1°C

  • Accuracy

    ±2°C

  • Under the following conditions:

  • Speed Range

    5m/s - 60m/s

  • Operating Range

    -20°C to +60°C

  • Temperature Difference
    between the air temperature and the actual temperature of the sensor

    <10°C

  • SENSOR PERFORMANCE

  • Measurement principle

    Acoustic Resonance (automatically compensates for variations in temperature, pressure & humidity)

  • Units of measure

    Metres per second, kilometres per hour or knots

  • Altitude

    0-4000m operating range

  • Temperature range

    -40° to +85°C (operating and storage)

  • Humidity

    0-100%

  • Ingress protection

    IP66, IP67 - when correctly installed with supplied O-ring

  • Heater settings

    0° to 55°C (factory and user configurable)

  • POWER REQUIREMENTS

  • Supply voltage

    6V to 30V DC (24V DC nominal). Supports battery operation with reduced heater capacity.
    EN 61000-4-29 only applicable when the sensor power supply is between 20V to 30V DC

  • Supply current (heater off)

    25mA typical (29mA with compass enabled)

  • Supply current (heater on)

    Up to 2A.
    This is the default heater current limit, if higher currents are required, please contact FT Technologies.
    Heater control is achieved through a closed loop system, therefore the power consumption of the heater is a function of the applied cooling load on the sensor and the user temperature set point. Maximum heating power is 60 W at 30 V.

  • Power consumption with heater disabled (for battery use):

    Battery Supply Voltage Compass Disabled Compass Enabled
    24V 600mW 696mW
    12V 300mW 348mW
    9V 225mW 261mW
    6V 150mW 174mW

  • PHYSICAL

  • I/O connector

    Universal M12 8-pole circular connector

  • Sensor weight

    252g

  • DIGITAL SENSOR

  • Interface

    RS422 (full-duplex). RS485 (half-duplex)

  • Format

    ASCII data, polled or continuous output modes, Polar and NMEA 0183

  • Data update rate

    Up to 10Hz

  • Error handling

    When the sensor detects an invalid reading a character is set in the wind velocity output message. This error flag character is 1

  • Overspeed Warning

    The sensor has an optional overspeed warning scheme. This scheme is disabled by default but can be enabled at the factory if requested. With the scheme enabled, if the sensor detects a wind speed greater than 75m/s a character is set in the wind velocity output message (see user manual for further details).

Datasheets:

User Manuals:
It is our policy to issue user manuals to existing customers only. However, in many circumstances we are willing to share sections of our manuals, if it will help to answer any technical queries you may have. To request a manual, please send us a request.

FT742-D-SM High Speed Wind Sensor Digital Surface Mount
FT742-D-SM KIT-1.5 High Speed Wind Sensor Digital Surface Mount with 1.5m cable
FT742-SM
Environmental Tests
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 Dust Test DEF STAN 00-35 Issue 4
Wind Blown Sand Test DEF STAN 00-35 Issue 4
Corrosion ISO 9227 (2006) & 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

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

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