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Weather Stations
NBL-W-SS Wind speed sensor(Cup Anemometer) is a device used to measure wind speed, small and lightweight, easy to carry and assemble. It can effectively obtain wind speed information, the shell is made of high quality polycarbonate composite material, rainproof, corrosion resistant, anti-aging, is a convenient to use, safe and reliable intelligent instrumentation. It is mainly used in meteorology, agriculture, ships and other fields, and can be used outdoors for a long time.
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The NiuBoL NBL-W-SS Wind Speed Sensor is a three-cup anemometer designed for continuous wind speed measurement in automatic weather stations, agricultural monitoring, environmental monitoring, ports, airports, marine applications and industrial systems.
The sensor is available with RS485 Modbus RTU, 4–20 mA, 0–5 V, 0–2.5 V and pulse output, allowing direct integration with PLC, RTU, data loggers, weather station controllers and IoT gateways.
Two wind speed ranges are available: 0–45 m/s for standard meteorological and agricultural monitoring, and 0–70 m/s for applications requiring a wider wind-speed range. The starting wind speed is ≤0.5 m/s, allowing the cup assembly to respond to relatively light wind conditions.
| Model | NBL-W-SS |
| Product Name | 3-Cup Wind Speed Sensor / Cup Anemometer |
| Measured Parameter | Wind Speed |
| Measurement Range | 0–45 m/s or 0–70 m/s |
| Accuracy | ±(0.3 + 0.03V) m/s, where V is wind speed |
| Resolution | 0.1 m/s |
| Starting Wind Speed | ≤0.5 m/s |
| Wind Cup Structure | Three-cup vertical-axis anemometer |
| Wind Cup Material | Carbon fiber |
| Power Supply | DC 5 V / DC 12–24 V depending on output configuration |
| Output Options | RS485 / 4–20 mA / 0–5 V / 0–2.5 V / Pulse |
| Current Output Load | ≤250 Ω |
| Voltage Output Load | ≥1 kΩ |
| Operating Temperature | -40 to 80°C |
| Operating Humidity | ≤100%RH |
| Protection Rating | IP65 |
| Power Consumption | Approx. 50 mW |
| Product Weight | Approx. 130 g |
| Standard Cable Length | 2.5 m, customizable |
The NBL-W-SS uses three wind cups positioned around a vertical rotating shaft. Wind produces aerodynamic force on the cups, causing the rotor to turn.
As wind speed increases, the rotational speed of the cup assembly also increases. The internal sensing and signal-processing circuit converts the rotation into a corresponding electrical or digital wind-speed signal.
| Three Wind Cups | Capture wind from any horizontal direction and rotate the vertical shaft. |
| Rotating Shaft | Transfers cup rotation to the internal sensing mechanism. |
| Signal Processing | Converts rotational speed into wind-speed data. |
| Output Interface | Provides RS485, analog or pulse output according to the selected model. |
| Range | Recommended Application | Selection Consideration |
|---|---|---|
| 0–45 m/s | Agriculture, standard weather stations, greenhouses, environmental monitoring and research | Suitable when expected wind speeds remain within normal meteorological monitoring ranges |
| 0–70 m/s | Coastal sites, ports, exposed locations and projects requiring a wider measurement range | Select when higher maximum wind speeds may occur or additional measurement headroom is required |
The measurement range should be selected according to the expected maximum wind speed at the installation site rather than simply choosing the widest available range.
| Output | Typical Connection | Best Fit |
|---|---|---|
| RS485 Modbus | PLC, RTU, data logger, IoT gateway | Digital weather stations and multi-sensor monitoring systems |
| 4–20 mA | Industrial analog input module | Long cable runs and conventional industrial control systems |
| 0–5 V | Voltage analog input | Controllers and acquisition modules with 0–5 V input |
| 0–2.5 V | Low-voltage analog input | Embedded or specialized acquisition systems |
| Pulse | Pulse / frequency input | Controllers that calculate wind speed from pulse frequency |
For the pulse-output version, wind speed is calculated from pulse frequency according to:
W = 0, when f = 0
W = 0.1 + 0.0875 × f, when f ≠ 0
| W | Wind speed in m/s |
| f | Pulse frequency |
The RS485 version is suitable for distributed weather-monitoring systems because multiple Modbus sensors can share an appropriately designed RS485 communication bus.
NBL-W-SS → RS485 Modbus → Data Logger / PLC → 4G / Ethernet / LoRaWAN → Cloud or Private Server
| Multi-Sensor Network | Assign a unique Modbus address to each sensor on the same RS485 bus. |
| Cable | Use suitable twisted-pair communication wiring for RS485 A/B. |
| Power Supply | Select the correct DC supply according to the ordered sensor configuration. |
| Remote Transmission | A compatible gateway can forward data through MQTT, HTTP, TCP or another supported protocol. |
| Three-Cup Design | Measures wind speed independently of horizontal wind direction. |
| Low Starting Wind Speed | ≤0.5 m/s starting threshold supports measurement under relatively light wind conditions. |
| Carbon-Fiber Wind Cups | Lightweight construction supports rapid rotor response while providing mechanical strength. |
| Multiple Output Options | RS485, current, voltage and pulse outputs allow integration with different acquisition systems. |
| Low Power Consumption | Approx. 50 mW, suitable for solar-powered and remote weather stations. |
| IP65 Protection | Designed for outdoor weather monitoring with protection against dust and water jets. |
The compact flange-mounted structure allows the NBL-W-SS to be installed on weather station masts, monitoring towers and other outdoor support structures.
| Approx. Overall Height | 161 mm |
| Rotor Diameter | Approx. Ø180 mm |
| Body Diameter | Approx. Ø55 mm |
| Base Width | Approx. 70 mm |
| Installation Item | Recommendation |
|---|---|
| Open Exposure | Install where surrounding buildings, trees and structures do not unnecessarily block or distort airflow. |
| Vertical Alignment | Keep the rotating shaft approximately vertical so the cup assembly can rotate normally. |
| Mechanical Clearance | Confirm that the wind cups rotate freely without touching brackets, cables or other equipment. |
| Mast Mounting | Secure the sensor firmly to reduce vibration and unwanted movement. |
| Cable Routing | Secure the cable to the mast and protect connectors and cable joints from mechanical stress and prolonged water accumulation. |
| Automatic Weather Stations | Agricultural Monitoring | Environmental Monitoring |
| Ports & Harbors | Airports | Marine Monitoring |
| Industrial Sites | Research Stations | Transportation Meteorology |
| Component | Measurement / Function |
|---|---|
| NBL-W-SS Wind Speed Sensor | Wind speed |
| Wind Direction Sensor | Wind direction |
| Temperature & Humidity Sensor | Air temperature and relative humidity |
| Rain Gauge | Rainfall amount and rainfall intensity |
| Solar Radiation Sensor | Solar irradiance |
| Data Logger / Gateway | Collects sensor data and provides local or remote communication |
| Comparison | NBL-W-SS Cup Anemometer | Ultrasonic Wind Sensor |
|---|---|---|
| Measurement Principle | Mechanical rotating cups | Ultrasonic transit-time measurement |
| Moving Parts | Yes | No |
| Main Advantage | Simple, mature and cost-effective wind-speed measurement | No mechanical rotor and can integrate wind speed and direction |
| Typical Selection | Modular weather stations and projects requiring standard industrial outputs | Compact stations and applications requiring integrated wind measurement |
| Wind Cups | Check periodically for physical damage, deformation or material wrapped around the rotor. |
| Rotation | Confirm that the cup assembly rotates freely without abnormal friction or obstruction. |
| Mounting | Check mounting screws and mast connections after severe weather or maintenance work. |
| Cable | Inspect outdoor cable sections and connectors for mechanical damage or water ingress. |
| Data Verification | Investigate unusually constant, zero or inconsistent readings by checking rotor movement, wiring and data-acquisition settings. |
A1. The NBL-W-SS measures wind speed. A separate wind direction sensor is required when wind direction also needs to be measured.
A2. Yes. It uses a traditional three-cup vertical-axis structure and can also be described as a 3-cup anemometer.
A3. Two configurations are available: 0–45 m/s and 0–70 m/s.
A4. The specified starting wind speed is ≤0.5 m/s.
A5. Yes. An RS485 version is available for integration with compatible Modbus data loggers, PLCs, RTUs and IoT gateways.
A6. Yes. The NBL-W-SS is available with 4–20 mA output, as well as voltage, pulse and RS485 configurations.
A7. Yes. The NBL-W-SS has an IP65 protection rating and is designed for outdoor wind-speed monitoring in automatic weather stations and environmental monitoring systems.
A8. Yes, provided each RS485 device is configured with a unique address and the communication bus, power supply and polling interval are correctly designed.
A9. Yes. The standard cable length is 2.5 m and other lengths can be specified according to installation requirements.
A10. Yes. The RS485 sensor can connect to a compatible data logger or IoT gateway, which can then transmit the data to a cloud platform or private server using supported communication protocols.
NBL-W-SS-Wind-Speed-Sensors-Instruction-Manual-V4.0.pdf
The NBL-W-SS Wind Speed Sensor provides a flexible solution for projects requiring a traditional three-cup anemometer with industrial communication outputs. RS485 Modbus, 4–20 mA, voltage and pulse versions allow the same wind-speed sensor platform to be integrated into weather stations, PLC systems and remote IoT monitoring networks.
For quotation and model selection, specify the required wind-speed range, output signal, power supply, cable length, quantity and the equipment that will receive the sensor data.
Prev：Wind Direction Sensor RS485 Modbus & 4-20mA | NBL-W-DS
Next：Atmospheric Temperature Humidity air pressure Sensor for weather station RS485
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