F T 722- F F (F L AT F R O N T )ACOU ST I C R E S ON A N C E W IN D SE NSOR

D ES I G NED FO R T URBI N E CO N T R O L

BThe FT722 Flat Front wind sensor is designed for quick and easy
installation against a metal bar. The bar allows the sensor to bealigned to the central axis of the turbine without error.
Ideal for retrofit, the sensor provides a single, compact solution
to replacing an existing mechanical wind vane and anemometerwind 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. With updated
software and improved accuracy, it is also a fit and function
replacement for the FT702LT-FF sensor.
The FT722-FF has sufficient heating capacity to keep itself
ice-free and to heat the mounting bar. This prevents ice frombuilding up and blocking air flow through the measurement
cavity. It has passed over 30 environmental tests to demonstrate
its durability.

CA

DI M E NS IONS
A. Sensor height		

161mm

B. Sensor width max.

56mm

C. Top of mounting flat to cavity centre

E66.3mm

D. Mounting flat height

25mm

E. Bottom of mounting flat to hole centre

17mm

F. Centre of mounting flat to hole centre

5.1mm

FDSP EC I F I C AT I O NS AT A GL ANC E
WI N D S PE E D

0-50

WEIGHTm/s

320

AVAILABILIT Y

gTHE WORLD’S TOUGHEST WIND SENSORSW W W. F T T E C H N O L O G I E S . C O M

>

99.9%

F T 722- F F (F L AT F R O N T )WIND SPEED

Range 					0-50m/sResolution				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 				1°Accuracy (within ±10° datum)		 2° RMS
Accuracy (outside ±10° datum)		 4° 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 <10°C
between the air temperature and theactual temperature of the sensor*Available on digital sensors only

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 and IPX6K
Heater settings 				0° to 55°C. The heater set point can be configured

POWER REQUIREMENTS

Supply voltage 				12V to 30V DC (24V DC nominal)
Supply current (heater off ) 		31mA typicalSupply 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 (RS485 option), 8-way (4-20mA option) multipole connector
Sensor weight 				320g

DIGITAL SENSOR

Interface 				RS485 (half-duplex), galvanically isolated from power supply lines and caseFormat 				ASCII data, polled or continuous output modes, Polar and NMEA 0183
Data update rate 				Maximum 10 measurements per secondError handling 				When the sensor detects an invalid reading a character is set in the wind velocity output message.					This error flag character is 1

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).

EMC AND ENVIRONMENTAL TESTSThe FT7 Series have passed over 30 different environmental test certificates including Corrosion, Icing, De-Icing, Shock, Hail, Drop, ESD, power interruption
and EMC. Further test details and full test reports available on request or via our website.
FT Technologies Ltd
Sunbury House, Brooklands Close
Sunbury on Thames, TW16 7DX, UK
Tel: +44 (0)20 8943 0801 | info@fttechnologies.com
The FT and Acu-Res logos and the Acu-Res® nameare registered trade marks of FT Technologies Ltd.

A4153-5-EN
Information furnished by FT Technologies Ltd is believed
to be accurate and reliable. However, no responsibility isassumed by FT Technologies Ltd for its use; nor for any
infringements of patents or other rights of third parties which
may result from its use. No licence is granted by implicationor otherwise under any rights of FT Technologies Ltd.