Wind Sensor Comparison

Whilst the FT702-V22 is still available to order, for new customers we would recommend the FT722 which reads wind speeds 0-50m/s with greater accuracy. Please note that due to component obsolescence, the FT702LM1 and LM2 have now been withdrawn and are replaced by the FT742-SM. For those customers who need a higher wind speed reading range, then we recommend the FT742 as it reads wind speeds up to 75m/s.

FOUR MOUNTING OPTIONS

FT742-FF Flat Front ultrasonic wind sensor measuring wind speed and direction
FLAT FRONT (FF)

Ideal for wind turbine control

FT742-PM Pipe Mount ultrasonic wind sensor with heating for ice-free wind speed measurement 
PIPE MOUNT (PM)

Ideal for wind turbine control

FT742-DM Direct Mount ultrasonic wind sensor for wind speed and direction measurement in meteorology, weather stations, subzero extreme conditions
DIRECT MOUNT (DM)

For use in meteorological applications

FT742-SM surface mount ultrasonic wind sensor for drones, UAVs, unmanned systems, robotics
SURFACE MOUNT (SM)

Designed for OEM integration

 

THREE MODELS

Feature

FT742

FT722

FT702-V22

Speed range

0-75 m/s

0-50 m/s

0-50 m/s

Speed accuracy

±0.3m/s (0-16m/s)

±2% (16m/s-40m/s)

±4% (40m/s-75m/s)

±0.3m/s (0-16m/s)

±2% (16m/s-40m/s)

±4% (40m/s-50m/s)

±0.5m/s (0-15m/s)

±4% (16m/s-50m/s)

Directional accuracy

Within ±10° datum: 2° RMS

> ±10° of datum: 4° RMS

Within ±10° datum: 2° RMS

> ±10° of datum: 4° RMS

Within ±10° datum: ±2°

> ±10° of datum: ±4°

Data update rate

10Hz

10Hz

5Hz

Mounting options

Flat Front (FF)

Pipe Mount (PM)

Direct Mount (DM)

Surface Mount (SM)

Flat Front (FF)

Pipe Mount (PM)

Flat Front (FF)

Pipe Mount (PM)

Applications

Wind Turbine Control (FF & PM)

Meteorology (DM)

OEM Integration (SM)

Wind Turbine Control

Wind Turbine Control

Warranty

2 years

2 years

1 year

Error flag digital

An invalid reading character of “1”is set in the wind velocity output message.

An invalid reading character of “1”is set in the wind velocity output message.

An invalid reading character of other than 0 is set in the wind velocity output message.

Error flag analogue

Both speed and direction current loops drop to a default value of 1.4mA (configurable to 3.9mA)

Both speed and direction current loops drop to a default value of 1.4mA (configurable to 3.9mA)

Both speed and direction current loops drop to a default value of 1.4mA (configurable to 3.9mA)

Over-speed warning digital

An over-speed character of “2” is set in the wind velocity output message.

An over-speed character of “2” is set in the wind velocity output message.

An over-speed character of “2” is set in the wind velocity output message.

Over-speed warning analogue

The speed current loop is set to 20.0mA and the direction current loop is set by default to 1.4mA (configurable up to 3.9mA).

The speed current loop is set to 20.0mA and the direction current loop is set by default to 1.4mA (configurable up to 3.9mA).

Both speed and direction current loops drop to a default value of 1.4mA (configurable up to 3.9mA)

Over-speed warning default setting

The separate over-speed warning scheme is off by default in which case an over-speed event is shown by the error flag. The over-speed scheme can be enabled by FT before despatch on request.

The separate over-speed warning scheme is off by default in which case an over-speed event is shown by the error flag. The over-speed scheme can be enabled by FT before despatch on request.

Not applicable

FIR Filter length

Default 16 readings -1.6 secs. configurable to 64 readings – 6.4 secs.

Default 16 readings -1.6 secs. configurable to 64 readings – 6.4 secs.

Default 8 readings -1.6 secs. configurable to 64 readings – 12.8 secs.

Selective filter scheme

Improved data processing scheme – off by default. Can be enabled on despatch. Contact FT for scheme details

Improved data processing scheme – off by default. Can be enabled on despatch. Contact FT for scheme details

Part numbers FT742-D-FF, FT742-A-FF, FT742-D-PM, FT742-A-PM, FT742-D-DM, FT742-A-DM, FT742-D-SM  FT722-D-FF, FT722-A-FF, FT722-D-PM, FT722-A-PM FT702LT-V22-FF, FT702LT/D-V22-FF, FT702LT-V22-PM, FT702LT/D-V22-PM, FT702LT/D50-V22-FF, FT702LT/D50-V22-PM, FT702LT/D60-V22-FF, FT702LT/D60-V22-PM, FT702LT/D70-V22-FF, FT702LT/D70-V22-PM
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