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 and IP67
  • 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 tunnel checked before despatch, no recalibration required
  • 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
  • Please note that the FT742-DM50 is still awaiting finalisation and therefore its product certification is still outstanding.
  • DIMENSIONS
  • Sensor height
  • Sensor width max
  • I/0 connector width
  • Mounting pipe external width
  • Mounting flange width
  • WIND SPEED
  • Range
  • Resolution
  • Accuracy
  • WIND DIRECTION
  • Range
  • Resolution
  • Accuracy (within ±10° datum)
  • ACOUSTIC TEMPERATURE
    Available on digital sensors only
  • 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)
  • PHYSICAL
  • I/O connector
  • Sensor weight
  • DIGITAL SENSOR
  • Interface
  • Format
  • Data update rate
  • Error handling
  • ANALOGUE SENSOR
  • Interface
  • Format
  • 4-20mA configuration port
  • Error handling
 
  • DIMENSIONS

  • Sensor height

    174mm

  • Sensor width max

    70mm

  • I/0 connector width

    22.1mm

  • Mounting pipe external width

    51mm

  • Mounting flange width

    70mm

  • 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
    Available on 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

  • 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 and IP67

  • Heater settings

    0° to 55°C. The heater set point can be configured

  • POWER REQUIREMENTS

  • Supply voltage

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

  • Supply current (heater off)

    31mA typical

  • Supply current (heater on)

    Limited to 4A (default), 6A (max) – configurable in software in 0.1A increments. Heater power consumption will depend on the energy required to keep the sensor’s temperature at the user determined set point. The heater and sensor power consumption is limited by default to 99W.

  • PHYSICAL

  • I/O connector

    5-way (RS485HD option), 8-way (4-20mA option) multipole connector

  • Sensor weight

    535g

  • DIGITAL SENSOR

  • Interface

    RS485 (half-duplex), galvanically isolated from power supply lines and case

  • 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 an error flag is included in the wind velocity output message (see user manual for further details).

  • ANALOGUE SENSOR

  • Interface

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

  • Format

    One 4-20mA current loop for wind speed (different scaling factors are available). One 4-20mA current loop for wind direction (datum value configurable as 4mA or 12mA). Both analogue channels are updated ten times per second.

  • 4-20mA configuration port

    This port is for the user to change the internal settings of analogue sensors and to perform diagnostic testing. This interface is not intended for permanent connection to a data logger or other device.

  • Error handling

    When the sensor detects an invalid reading then both speed and direction current loops will drop to a default value of 1.4mA (configurable up to 3.9mA).

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

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