Cup anemometer 3S-WS-I-P

heatedwith analog outputcompact

Product overview
The 3S-WS-I-P is a plastic cup anemometer with analog output (4–20 mA) designed for compact PV met stations, small weather stations and simple industrial monitoring where horizontal wind speed measurement is required without a heavy metal unit. Supplied with mounting kit and 3 m LIYYC11Y PUR UV- and weather-resistant cable. Optional heating kit available for icing-prone sites.

Measurement principle
The sensor measures horizontal wind speed independently of wind direction. A rotating magnet on the cups actuates a reed switch; pulse frequency is proportional to rotation speed and thus to wind speed.

Technical specifications

• Item code: 3S-WS-I-P
• Sensor type: Cup anemometer (reed switch)
• Measuring range: 0.9 to 50 m/s
• Accuracy: <0.9? threshold 0.9 m/s; below 5 m/s ±0.5 m/s; above 5 m/s ±10% of reading
• Resolution: 0.1 m/s
• Threshold: 0.9 m/s
• Survival speed: 80 m/s
• Data output: Analog (4–20 mA)
• Power supply: 12 to 30 V DC
• Cable: 3 m LIYYC11Y PUR, UV- and weather-resistant
• Operating temperature: -40°C to +85°C (ice free)
• Dimensions: Ø 136 x 151 mm
• Weight: 0.2 kg
• Housing material: ASA
• Cup material: ABS
• Mounting: Pipe or ground mounting
• Standard: Compliant with IEC 61724-1:2021

What it measures and why it is useful
The 3S-WS-I-P provides reliable horizontal wind speed (m/s) data. In PV monitoring and small meteorological stations wind speed helps to:

• assess module cooling and its impact on temperature and energy yield,
• support event reporting during high-wind or gust conditions,
• enrich performance analysis alongside POA irradiance and module temperature.

Why choose this sensor
This plastic analog model is suited when an economical, lightweight sensor with universal 4–20 mA compatibility is needed for multi-site standard met stations and simple industrial or agricultural monitoring. It is easy to replace across fleets and integrates with dataloggers, PLCs and SCADA systems with analog inputs.

How it works
The three cups rotate in the wind. A magnet on the rotor triggers a reed switch each revolution; the pulse frequency is converted by the internal transducer to a proportional 4–20 mA current loop signal. The receiving datalogger or PLC converts current to wind speed using the defined calibration.

Typical applications

• Utility, commercial & industrial and rooftop PV plants for IEC 61724-1 monitoring,
• Compact weather stations and environmental networks,
• Industrial and agricultural sites requiring basic analog wind speed measurement.

Additional information (FAQ highlights)

• Calibration: Each unit is factory-tested and calibrated in a precision wind tunnel.
• Compatibility: Standard 4–20 mA current loop; 4 mA = minimum, 20 mA = maximum measured value; connects to SCADA, PLC or datalogger analog inputs.
• Cable & options: Supplied with 3 m LIYYC11Y PUR cable; custom lengths and heating kit available.
• Warranty: 2 years against manufacturing defects.
• Price indication & lead time: Typical price range €110–€200; small orders ~5–7 days, bulk (100 pcs) ~6–7 weeks.