The Ultrasonic Anemometer 3 D serves for the measurement of the wind direction and the wind velocity from all spatial directions. The maintenance-free and wearless anemometer needs no re-calibration, and is equipped with a heating for winter operation even under extreme conditions.
All calculations are carried out by a high-capacity digital-signal-processor (DSP) within the propagation time of the ultrasonic signals with an accuracy basis of 32 bit.
The instrument offers comprehensive statistic functions such as gliding averaging, standard deviation, co-variance etc., which can be selected via the digital interface. The gliding averaging can be set optionally in vectorial or scalar form, identically or differently for each parameter.

Technical Data
Wind velocity and wind direction
Measuring range    0,01 - 65 m/s azimut 0° - 360°,
0,01 - 65 m/s elevation 0° - 180°
Accuracy    WG +/- 0,1 m/s (<5 m/s) 2% (>5 m/s)
WR +/- 1°
Acoustic-virtual temperature
Measuring range    -40°C to +70°C
Accuracy    +/- 0,5 Kelvin in the range from -40°C bis +70°C
Output of measured values
Measuring rate    1 msec to 60 seconds, selectable in 1-msec increments
Output rate    1 msec to 60 seconds, selectable in 1-msec increments
Data output digital    RS485/RS422, bus operation, FD/HD
Baud rate    1200 to 921600 Bps
Analogue output    3 analogue channels for output of X,Y, Z vector-components 0-10 V load, 4000 ohms, 4-20 mA to 400 ohms load
Analogue inputs    3 x standard, 2 x optional; voltage inputs 0-10 V, resolution 16 bit, measurement error < 0,1%
Output-format    ASCII Thies, NMEA 0183 version 3, user-definable, status
Features
Firmware update    Upload via serial interface (RS485)
General
Operating voltage    12-24 V AC/DC current consumption: 3 VA, heated 150 VA The heating, which can be switched off, is temperature-controlled
Temperature range    -55°C to + 70°C
Protection    IP 65