ZAS Doppler sodar wind profiler is a low-cost aerial wind measurement product. It can measure wind speed and wind direction values at 20 levels with an average height of 200m, and has done rigorous comparison tests.
Compared with traditional instruments, ZAQ Doppler sodar wind profiler is more convenient to install. It uses RS485 interface and Modbus RTU standard protocol to communicate, with low power consumption, and supports solar power supply and wireless communication.
|Monitoring Parameters||Wind speed / Wind direction|
|Monitoring Principle||Piezoelectric Acoustic Transducer|
|Power-In||DC12/24V / Solar Power|
|<15 kg |
<50 L x 50 W x 27 H(cm) (including radome)
|Signal Parameters||Transmitting frequency|
Peak Power Consumption
|Multiple transmitting frequencies|
-40°C ~ +80°C
2A@ 24 VDC (without heating function)
|Detection Performance (40 dBA, 15°C air temperature, 70 % relative humidity)||Maximum Layers|
Measurement Height Range
Detection Average Time
Horizontal Wind Accuracy
Vertical Wind Accuracy
Wind Direction Accuracy
Horizontal Wind Range
Vertical Wind Range
No less than 10m
0.3m/s or 3%V
3° (@ wind speed>5m/s)
|System Function||Data interface|
Real-time access to geographic information (optional)
What is a Sodar?
Sodar is a meteorological instrument used as a wind profiler to measure the scattering of sound waves by atmospheric turbulence. SODAR systems are used to measure wind speed at various heights above the ground, and the thermodynamic structure of the lower layer of the atmosphere.
How does a Sodar works?
A Sodar works by sending out a sound pulse (beep) and recording the sound as it’s scattered off atmospheric turbulence back to the Sodar. The principle is very similar to the well known radar technique which transmits a radio wave and records echoes from objects.
How is impact of rains on Sodars?
Actually the rain drops size being much smaller than the acoustic wavelength, their down speed is not detected by sodars. However poorly designed Sodars will exhibit spurious down speeds due to high harmonics of either 50 Hz or 60 Hz harmonics of the power supply in humid conditions.
How is impact of snow and fog on Sodars?
Both snow and fog will make the Sodar reflective signal stronger, but when there is a snowstorm, it needs to be done every now and then to clear the surface adhesion and use the mode of heating the transmitter.
How is impact of ambient acoustic noise on Sodars?
Ambient noise will affect the monitoring level and the reception of the signal, although it can be filtered by the algorithm, but the monitoring data has actually been separated from the real environment, so we require that the ambient noise should preferably be lower than 40dBA.
How is impact of ground clutter on Sodars?
We have minimized the impact of ground obstacles on the signal with our algorithm, but we still recommend that you try to detect in an open area to get more accurate data.
How is impact of high winds on Sodars?
High wind pairs produce higher ambient noise and reduce the measurement height range. We have done the optimization process by structural design to reduce the effect of turbulence and measure in the horizontal direction to 30m/s range.