NBL-W-3D-UWDS 3D Ultrasonic Anemometer

The NBL-W-3D-UWDS 3D ultrasonic anemometer measures three-dimensional wind vectors using three pairs of ultrasonic transducers. It provides resultant wind speed, horizontal wind direction, vertical wind direction and X/Y/Z-axis wind speed components, commonly represented as U, V and W.

Unlike a conventional cup anemometer and wind vane, the sensor has no rotating wind-measurement components. Ultrasonic transit-time measurement allows both horizontal and vertical airflow to be captured, making the instrument suitable for applications where a conventional 2D wind sensor does not provide enough information.

With a wind speed range up to 60 m/s, RS485 Modbus communication, DC 9–24V supply and IP66 protection, the sensor can be integrated with compatible data loggers, PLCs, research acquisition systems and IoT gateways for meteorological, wind-energy, bridge, tunnel, marine and airflow-monitoring projects.

NBL-W-3D-UWDS Technical Specifications

3D Wind Measurement Range and Accuracy

What Do U, V and W Wind Components Mean?

A standard 2D anemometer describes airflow mainly in the horizontal plane. A 3D ultrasonic anemometer additionally measures the vertical airflow component.

The instrument also calculates resultant wind speed and derives horizontal and vertical wind direction from the three measured vector components.

How Does a 3D Ultrasonic Anemometer Work?

The NBL-W-3D-UWDS uses three pairs of ultrasonic transducers arranged in three-dimensional space. Each pair alternately transmits and receives ultrasonic signals.

Air movement changes the travel time of sound between opposing transducers. A signal travelling with the airflow reaches the opposite transducer differently from a signal travelling against the airflow. By measuring these transit-time differences, the instrument calculates wind velocity along the X, Y and Z axes.

The three vector components are then used to calculate resultant wind speed, horizontal wind direction and vertical wind direction. This allows the sensor to describe airflow in three dimensions rather than only in the horizontal plane.

Why Use a 3D Sonic Anemometer?

3D Ultrasonic Anemometer Structure and Dimensions

Three pairs of ultrasonic transducers are positioned around the measurement volume so wind components can be measured along three axes. The sensor has an approximate overall height of 755 mm and an outer measurement-frame diameter of approximately 280 mm.

RS485 Modbus Communication

The 3D ultrasonic anemometer with RS485 Modbus provides six main real-time wind values through one digital communication interface.

Modbus Measurement Order

Modbus Read Command

For device address 01, the manual provides the following command to read the six real-time measurement registers:

01 03 00 00 00 06 C5 C8

The returned data follows the measurement order shown above. Wind-speed components use 0.01 m/s resolution, while direction channels use 1° resolution.

Wiring

The wiring label supplied with the actual communication cable should be used as the final wiring reference. Complete and verify all connections before applying power.

Product Construction

The NBL-W-3D-UWDS uses an all-metal housing and transducer support structure. The fixed ultrasonic transducers do not require conventional wind cups or a mechanical vane to rotate with the airflow.

Installation and Direction Alignment

Install the 3D ultrasonic anemometer in an open location where surrounding structures do not significantly obstruct or distort the airflow. The sensor should normally be mounted at the top of the supporting mast or structure where practical.

3D Ultrasonic Anemometer vs 2D Ultrasonic Anemometer

3D Ultrasonic vs Mechanical Anemometer

Typical 3D Wind Measurement Applications

The NBL-W-3D-UWDS is most useful in projects where vertical airflow or three-axis wind components provide information that cannot be obtained from a conventional 2D wind sensor.

Meteorological Research  •  Wind Energy  •  Bridge Wind Monitoring  •  Tunnel Airflow
Airports & Aviation  •  Marine & Ports  •  Urban Wind Studies  •  Environmental Research

Can It Be Used for Eddy Covariance?

Eddy covariance systems normally require more than simply having U/V/W wind outputs. Projects may specify high-frequency sampling, sonic temperature, synchronization with gas analyzers, timestamp accuracy, raw-data access and particular data-output formats.

The NBL-W-3D-UWDS should therefore not automatically be presented as an eddy-covariance-grade sonic anemometer unless the project's required sampling frequency, data protocol and research specifications have been reviewed and confirmed.

RS485 System Integration

3D Ultrasonic Anemometer → RS485 Modbus → Data Logger / PLC / Research Acquisition System → Ethernet / 4G → Cloud Platform or Private Server

The anemometer itself provides the RS485 wind measurements. Remote Ethernet, 4G, Wi-Fi, MQTT or server communication requires a compatible data logger or gateway.

How to Select a 3D Ultrasonic Anemometer

3D Ultrasonic Anemometer FAQ

Q1. What does the NBL-W-3D-UWDS measure?

A1. It measures resultant wind speed, horizontal wind direction, vertical wind direction and X/Y/Z-axis wind speed components.

Q2. What is the wind speed range?

A2. Resultant wind speed is 0–60 m/s. X, Y and Z wind components are specified from -60 to +60 m/s.

Q3. What is the difference between a 2D and 3D ultrasonic anemometer?

A3. A 2D wind sensor measures airflow mainly in the horizontal plane. A 3D anemometer additionally measures the vertical wind component and provides three-axis U/V/W wind data.

Q4. Does the sensor have moving parts?

A4. It has no conventional rotating wind cups or mechanical wind vane. Wind is measured using ultrasonic transit time between fixed transducers.

Q5. Does it support RS485 Modbus?

A5. Yes. The sensor provides RS485 Modbus communication and returns six main real-time wind parameters.

Q6. What are U, V and W wind components?

A6. U and V represent wind components along two horizontal axes, while W represents the vertical airflow component.

Q7. Does the sensor measure vertical wind direction?

A7. Yes. The specified vertical wind direction range is -90° to +90° with 1° resolution.

Q8. Can it be used for bridge or tunnel airflow monitoring?

A8. Yes. Bridge, tunnel and structural airflow monitoring are typical applications where multi-axis wind information can be useful.

Q9. Is it suitable for eddy covariance research?

A9. Do not select it for eddy covariance only because it provides U/V/W data. Eddy-covariance projects may require specific sampling rates, sonic temperature, synchronization and raw-data functions that must be checked separately.

Q10. What information is required for a quotation?

A10. Provide the quantity, application, required wind parameters, sampling requirements, cable length, mounting environment, power supply and receiving data logger, PLC or research acquisition system.

NBL-W-3D-UWDS Datasheet

NBL-W-3D-UWDS-3D-Ultrasonic-Anemometer-Datasheet.pdf

Request a 3D Ultrasonic Anemometer Quotation

For quotation and model confirmation, provide the application, required wind parameters, quantity, cable length, installation height, mounting environment, power supply and receiving RS485 data-acquisition equipment.

For wind-energy, turbulence, structural engineering or research projects, also provide the required sampling rate, data-output format, raw-data requirements, synchronization requirements and whether additional measurements such as sonic temperature are required. This allows suitability to be confirmed before ordering.