Multi-sensor weather station 3S-CWS

for solar power plantsmonitoringcompact

Product Overview
The 3S-CWS Compact Weather Station is a professional all-in-one sensor unit that consolidates multiple meteorological measurements in one weatherproof housing. It outputs a unified dataset via Modbus RTU over RS485 for direct integration with SCADA, PLCs and dataloggers. The unit is suitable for solar PV monitoring, agricultural monitoring, smart city networks and environmental research.

Measured / Supported Data

• Global and Plane-of-Array (POA) irradiance
• Module temperature
• Ambient temperature
• Wind speed
• Wind direction
• Relative humidity
• Air pressure
• Precipitation

How it Works
The 3S-CWS integrates interchangeable external sensors into a sealed, UV-resistant connection box to enable fast, error-free installation. Connections follow a Plug & Play principle:

• Connection box with waterproof, UV-resistant connectors.
• Unique pin configuration per sensor to prevent incorrect wiring.

Signals from connected sensors are processed by the internal electronics and transmitted via RS485 using Modbus RTU at configurable baud rates for reliable communication with host systems.

Key Benefits / Why Choose the SEVEN Compact Weather Station

• All-in-one design — multiple weather parameters in a single unit
• Standards compliance — designed according to IEC 61724-1:2021 for PV monitoring
• Weatherproof enclosure — UV-protected housing with IP54 standard (IP67 optional)
• Plug-and-run installation — supplied with mounting system, brackets and cable for rapid deployment
• Easy integration — native compatibility with Modbus RTU systems

Typical Applications

• Solar PV plants — irradiance and environmental data for PR and yield analysis
• Agriculture — microclimate data to optimise irrigation and crop management
• Smart cities — distributed environmental monitoring and urban weather networks
• Research & academia — reliable meteorological datasets for studies and experiments

Frequently Asked Questions (product-related)

• What external sensors can be connected? Thermopile pyranometer, irradiance sensors (global & POA), module temperature sensor, ambient temperature sensor, wind speed sensor, wind direction sensor, relative humidity sensor, barometric pressure sensor, rain gauge. Sensors can be added or removed per project requirements.
• Is it compatible with SCADA or dataloggers? Yes, when the host supports RS485/Modbus RTU.
• Is the mounting structure included? Yes. Delivered with a coated steel mounting system and sensor brackets.
• Is a cable included? Supplied with a 3 m LIYYC11Y PUR cable (UV and weather resistant), 6 twisted conductors including ground. Other lengths on request.
• Power supply? 12–30 V DC (24 V recommended).
• Warranty? 2 years manufacturer’s warranty.
• Delivery times? Small orders: approx. 1–2 weeks. Bulk (100+ units): approx. 6–8 weeks.
• Price range? Depending on sensor configuration: approx. 1,030–1,870 EUR.

Technical Specifications

• Item code: 3S-CWS
• Measured data: Global & POA irradiance; module temperature; ambient temperature; wind speed; wind direction; relative humidity; air pressure; precipitation
• Standards: IEC 61724-1:2021
• Digital outputs: RS485 up to 38400 Baud
• Communication protocol: Modbus RTU (Modbus TCP/IP optional)
• Output rate: 1/s
• Operating temperature: -40°C to +85°C
• Operating humidity: 0–100 % RH
• Mounting structure material: coated steel
• Dimensions: 635 x 1123 x 1048 mm (W x L x H); height adjustable on request
• Weight: 5.8 kg
• IP rating: IP54 (IP67 optional)
• Power supply: 12–30 V DC
• Power consumption: 25 mA @ 24 V DC
• Electrical connection: 3 m LIYYC11Y PUR cable, UV and weather resistant
• Connection box material: ABS
• Galvanic isolation: 1000 V between power supply and RS485 bus