Cup anemometer 3S-WS-MB-P

for solar power plantswith integrated electronicscompact

Product overview
The 3S-WS-MB-P is a compact cup anemometer for horizontal wind speed measurement in solar PV plants and outdoor industrial sites. It provides a digital Modbus RTU output via RS485 for direct integration with dataloggers and SCADA systems. The sensor is supplied with a UV- and weather-resistant 3 m cable for straightforward field installation.

Why it is useful

• Wind speed influences PV module temperature and energy yield monitoring.
• Records wind events relevant for structural safety assessments and warranty cases.
• Delivers an accurate wind input to monitoring systems for improved diagnostics and alarms.

Key features and advantages

• Modbus RTU output (RS485) for direct connection to common PV dataloggers and SCADA.
• Compact cup-anemometer design with plastic cups and housing for lightweight outdoor deployment.
• Simple wiring and low-maintenance construction suitable for multi-site installations and replacements.

How it works
The 3S-WS-MB-P is a three-cup anemometer. Wind rotation turns the cups; a magnet on the rotating shaft actuates a reed switch once per revolution. An internal converter counts pulses and calculates wind speed (m/s); the Modbus-enabled unit then transmits the processed wind speed digitally over RS485 using Modbus RTU registers.

Pulse behaviour

• Higher wind → faster rotation → higher pulse frequency.
• Lower wind → slower rotation → lower pulse frequency.

Common applications

• Solar PV plants (utility, commercial, rooftop) for IEC 61724-1 performance monitoring.
• Small weather stations and environmental monitoring networks.
• Industrial outdoor monitoring where a reliable wind speed input is required.
• Agriculture and irrigation projects where wind affects operations.

Installation and commissioning

• Mount on a vertical pipe or structure; keep the sensor level and parallel to the ground for correct readings.
• Install clear of nearby obstacles (walls, equipment, trees); place above typical obstacles where feasible.
• Connect power (12–30 V DC) and RS485 (Modbus RTU); the unit begins reporting after wiring.
• Low maintenance: plastic body requires minimal care; clean cups if heavy debris accumulates.

Selected FAQ highlights

• Standards: Compliant with IEC 61724-1:2021 for PV performance monitoring.
• Compatibility: Works with systems supporting RS485 / Modbus RTU.
• Cable: Supplied with a 3 m LIYYC11Y PUR cable (UV- and weather-resistant); other lengths available on request.
• Warranty: 2-year warranty covering defects in materials or workmanship.
• Price range (reference): typically between 143 EUR and 260 EUR.

Technical specifications (table)
Item Code: 3S-WS-MB-P
Sensor Type: Cup star anemometer (reed switch)
Measuring Range: 0.9–60 m/s
Accuracy: ≤0.5 m/s for <5 m/s; 10% of reading for >5 m/s
Resolution: 0.1 m/s
Threshold: 0.9 m/s
Survival Speed: 80 m/s
Data Output: 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: -40°C to +85°C (ice free)
Dimensions: Ø 136 × 151 mm
Weight: 0.2 kg
Housing Material: ASA
Cup Material: ABS
Mounting: Pipe or ground mounting
Standard: Compliant to IEC 61724-1:2021

Technical specifications

• Item Code: 3S-WS-MB-P
• Sensor Type: Cup star anemometer (reed switch)
• Measuring Range: 0.9–60 m/s
• Accuracy: ≤0.5 m/s (<5 m/s); 10% (>5 m/s)
• Resolution: 0.1 m/s
• Threshold: 0.9 m/s
• Survival Speed: 80 m/s
• Data Output: RS485 up to 38400 Baud (Modbus RTU)
• Power Supply: 12–30 V DC
• Cable: 3 m LIYYC11Y PUR (UV & weather resistant)
• Operating Temperature: -40°C to +85°C (ice free)
• Dimensions: Ø136 × 151 mm; Weight: 0.2 kg
• Housing Material: ASA; Cup Material: ABS
• Mounting Method: Pipe or ground mounting
• Standard: IEC 61724-1:2021