Cup anemometer 3S-WS-MB-A

RS-485Modbusfor solar power plants

Product overview
Compact cup-star anemometer for measuring wind speed in solar PV plants and industrial sites. Provides Modbus RTU (RS485) output for direct integration with Modbus dataloggers, SCADA and inverters. Supplied with a 3 m LIYYC11Y PUR cable resistant to UV and weather.

What is Wind Speed Sensor and how does it work?
The device measures horizontal wind speed using a cup-star rotor coupled to a reed-switch counting mechanism. Outputs are processed into wind speed (m/s) and transmitted over Modbus RTU. The sensor body is anodized aluminum for corrosion resistance; cups are ABS. A separate transducer box houses the signal electronics.

Technical Specifications of Wind Speed Sensor
Item Code: 3S-WS-MB-A
Sensor Type: Cup Star Anemometer (Reed Switch)
Measuring Range: 0.9 to 60 m/s
Accuracy: < 5 m/s: ±0.5 m/s; ≥ 5 m/s: ±10% of reading
Resolution: 0.1 m/s
Threshold (Start-up): 0.9 m/s
Survival Wind Speed: 60 m/s
Data Output: Modbus RTU – RS485 (up to 38400 baud)
Communication Protocol: Modbus RTU
Power Supply: 12–30 V DC
Cable: 3 m LIYYC11Y PUR, UV and weather resistant
Operating Temperature Range: -40 °C to +85 °C (ice free)
Dimensions: Ø 180 x 145 mm
Transducer Box Dimensions: 82 x 80 x 55 mm (L x W x H)
Weight: 0.34 kg
Body Material: Anodized aluminum
Cup Material: ABS
Mounting: Pipe or ground mounting options
Standard: Compliant with IEC 61724-1:2021

How to install the wind speed sensor?
Install using either the supplied pipe-mount adapter or ground-mount configuration depending on site layout. Place the sensor clear of local obstructions and at a standardized height for solar monitoring. Connect the transducer box to the Modbus network following manufacturer wiring and grounding instructions.

Why Choose SEVEN Wind Sensors?

• Sensitivity: Cup-star design provides stable readings across the operational range.
• Durability: Anodized aluminum housing and UV-resistant cable for outdoor deployments.
• Integration: Native Modbus RTU output facilitates connection to dataloggers, SCADA and inverters.
• Low maintenance: Enclosed bearings and sealed electronics reduce service needs.
• Factory calibrated: Each unit is tested and calibrated before shipment.

Frequently Asked Questions (FAQ)
1- What is the warranty? All 3S-WS-MB-A sensors include a 2-year warranty.

2- What is the price of the wind speed sensor with Modbus RTU output? Typical price range: €220–€400, depending on options and order volume.

3- What are the delivery times?

• Small orders: approx. 2–3 weeks
• Bulk orders (100 pcs): approx. 7–9 weeks

4- How do I set up the sensor? Follow the supplied user manual for step-by-step installation, wiring and Modbus register mapping. The manual is provided by the manufacturer.

5- Does the sensor include a cable? Yes. Standard supply includes a 3 m LIYYC11Y PUR cable (UV and weather resistant). Other cable lengths available on request.

Characteristics / Technical specifications

• Item Code: 3S-WS-MB-A
• Sensor Type: Cup Star Anemometer (Reed Switch)
• Measuring Range: 0.9 to 60 m/s
• Accuracy: <5 m/s: ±0.5 m/s; ≥5 m/s: ±10% of reading
• Resolution: 0.1 m/s
• Threshold: 0.9 m/s
• Survival Speed: 60 m/s
• Data Output: Modbus RTU – RS485 (up to 38400 baud)
• Protocol: Modbus RTU
• Power Supply: 12–30 V DC
• Cable: 3 m LIYYC11Y PUR, UV and weather resistant
• Operating Temperature: -40 °C to +85 °C (ice free)
• Dimensions: Ø 180 x 145 mm
• Transducer Box: 82 x 80 x 55 mm (L x W x H)
• Weight: 0.34 kg
• Body Material: Anodized aluminum
• Cup Material: ABS
• Mounting Method: Pipe or ground mounting
• Standard: IEC 61724-1:2021