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WS303-UMB Smart Weather Sensor

Compact all-in-one weather sensor for measurement of temperature, relative humidity, radiation and air pressure.

From the WS product family of professional intelligent measurement transducers with digital interface for environmental applications. Integrated design with ventilated radiation protection for measuring: Air temperature, relative humidity, radiation and air pressure. One external temperature or rain sensor is connectable.

  • Temperature, relative humidity, radiation and air pressure
  • NTC/T, Capacitive/RH, Tiltable Pyranometer Kipp&Zonen/Radiation, MEMS capacitive/Pressure
  • Compact all-in-one weather sensor, low power, aspirated radiation shield, maintenance-free operation, open communication protocol
  • RS485 with supported protocols UMB-Binary, UMB-ASCII, Modbus-RTU, Modbus-ASCII, XDR and SDI-12
  • 8374.U11
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Advantages of the Smart Weather Sensor WS303

  • All-in-one housing concept of a compact weather sensor combining several measurement parameters in one housing with only one cable connection
  • Integrated Kipp & Zonen CMP3 Pyranometer, which is tuiltable
  • Built-in data pre-processing, universal interfaces and selectable output protocols
  • Compatible with many commercially available Met/HydroMet dataloggers and PLS systems thanks to an open communication protocol
  • Maintenance-free operation – no moving parts that can wear out
  • Suitable for all climate zones; also for solar-powered automatic meteorological stations
  • Ventilated temperature and humidity measurement according to WMO guidelines
  • Integrated heater that can be switched on if there is danger of frost

Examples of use of the Smart Weather Sensor WS303

The robust and maintenance-free smart weather sensor WS303 is designed for professional meteorological applications in all climate zones. It delivers reliable data, even in extreme ambient conditions.

Examples of use:

  • PV-Monitoring / Solar Monitoring on photovoltaic farms
  • Hydro-meteorological stations
  • Meteorological reference stations
  • Integration into various other systems/solutions, where these measurement parameters are needed...
EU declaration of conformity - Lufft WS Family
EU declaration of conformity - Lufft WS Family
Firmware - WSXXX
For WSXXX device versions ≥30 (see serial number) / Für WSXXX Gerätenummern ≥30 (siehe Seriennummer)
Firmware - WSXXX
For WSXXX device versions 1 - 29 (see serial number) / Für WSXXX Geräteversionen 1 - 29 (siehe Seriennummer)
Manual - Lufft UMB Config Tool (EN)
Manual - Lufft UMB Protocol (EN)
Manual - Lufft WSxxx weather sensor (EN)
V41
Manuel - Manuel - Lufft WSXXX Météo Capteurs (FR)
V37
Quickstart - Lufft WSXXX - Smart Weather Sensor Family (DE/EN)
Software - Lufft - ConfigTool .NET
Version 1.4
Software - UMB Config Tool
Video - Lufft: a passion for precision (Corporate Video)
Video - WS product family - Integration of external sensors
Video - WS product family: Our modular concept of the WS-family
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General
Technical data
Dimensions Ø approx. 150mm, height approx. 392mm
Weight Approx. 1.5kg
Interface RS485, 2-wire, half-duplex
Power supply 4...32 VDC
Operating temperature -50...60°C
Operating rel. humidity 0...100% RH
Heating 20VA at 24VDC
Protection level housing IP66
Cable length 10m
Mast mounting suitable for mast diameter 60 - 76mm
Radiation
Response time (95%) < 18 s
Non-stability (change/year) < 1 %
Non-linearity (0 to 1,000W/m²) < 1 %
Directional error (at 80° with 1,000W/m²) < 20 W/m²
Temperature dependence of sensitivity < 5 % (–10... +40 °C)
Tilt error (at 1000W/m²) < 1 %
Spectral range 300...2800 nm
Measuring range 2000 W/m²
Altitude 0...60 °
Azimuth -10 °...10 °
Temperature
Principle NTC
Measuring range -50 ... 60 °C
Unit °C
Accuracy ±0.2°C (-20...50°C), otherwise ±0.5°C (>-30°C)
Relative humidity
Principle Capacitive
Measuring range 0 ... 100 % RH
Unit % RH
Accuracy ±2% RH
Air pressure
Principle MEMS capacitive
Measuring range 300 ... 1200 hPa
Unit hPa
Accuracy ±0.5 hPa (0...40°C)
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