R3A-100™ Asymmetric Research Anemometer
The R3A-100 anemometer features an asymmetric sensor head configuration, which allows for more accurate measurement of horizontal flows with minimum interruption of the prevailing wind.
Designed with researchers in mind, this 3D ultrasonic anemometer will monitor wind speeds up to 45m/s and features a fast 100Hz sampling rate. R3A-100 is supplied as standard with 7 analogue outputs (U, V, W; SOS; PRT plus 2 analogue inputs) and is available with an optional inclinometer.
The R3A-100 offers class-leading 3-axis wind measurement with minimal disturbance to the airflow. The unit is constructed of aluminium and carbon fibre and is custom-calibrated.
The R3-100 symmetrical head version is also available, please click R3-100 to view.
R3A-100 Research Anemometer Technical Information
- Features
- Specifications
- Documentation
- 3-axis sonic anemometer providing wind speed and direction data
- 100Hz Data Output Rate
- Asymmetric head configuration for minimal flow disturbance
- 0-45m/s wind speed
- 0-359º wind direction range (no dead band)
- Ideal for Eddy Covariance Studies
- Free data logging software
- U, V, and W vector outputs
- Speed of sound and sonic temperature outputs
- Robust aluminium/carbon-fibre casing
Wind Speed Specifications
Range
0-45m/s
Accuracy
<1.0% RMS
Resolution
0.01m/s
Wind Direction Specifications
Range
0-359º
Accuracy
<±1.0º RMS
Resolution
1º
Speed of Sound
Range
300 - 370m/s
Resolution
0.01 m/s
Accuracy
< ±0.5% @ 20ºC
Measurement
Ultrasonic Output Rate
100Hz
Output Formats
UVW, Speed of Sound
Digital Output
Communication
RS422 full duplex, 8 data bits, 1 stop bit, no parity
Baud Rates
2400 - 115200
Output Rate
Selectable 0.4 to 100Hz
Analogue Outputs (via supplied PCIA unit)
Quantity
7 (U,V,W, SOS, PRT plus 2 analogue inputs)
Sampling
±10, ±20, ±30, ±60 m/s
Update Rate
0.4 to 100Hz
Range and Resolution
±2.5V, 14 bits
Accuracy
<0.1% of FSR
Analogue Inputs (via optional SIU)
Quantity
6 differential inputs
Sampling Rate
100Hz
Range and Resolution
±5V, 14 bits
Accuracy
<0.1% of FSR
PRT Input (via optional IU, PRT100 not included)
Input Resolution
0.01ºC
Input Accuracy
<0.01ºC (0ºC to +50ºC)
<0.15ºC (-40º to +60ºC)
<0.15ºC (-40º to +60ºC)
Inclinometer (optional)
Range and Resolution
±20ºC, 0.01º
Null Repeatability
±0.15º
Accuracy
±0.3º (-10º to +10º of inclination)
Power Requirement
Anemometer
9-30V DC <4W (<150mA @ 24V DC or 300mA @ 12V DC)
Mechanical
Material
Aluminium / Carbon Fibre
Weight
1.0 Kg
Size
750mm x 240mm
Environmental
Protection Class
IP65
Operating Temperature
-40ºC to +60ºC
Precipitation
300mm/hr
EMC
Emissions BS EN 50081-1 : 1992 (Emissions)
Immunity BS EN 50082-1 : 1997 (Immunity)
Immunity BS EN 50082-1 : 1997 (Immunity)
