Weather Stations

Lufft

WS501

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, air pressure, wind direction, wind speed and radiation. One external temperature or rain sensor is connectable.

  • Temperature, relative humidity, air pressure, wind direction, wind speed, radiation
  • Ultrasonic/Wind, NTC/T, Capacitive/RH, MEMS capacitive/Pressure, Kipp&Zonen Pyranometer/Radiation
  • Compact all-in-one weather sensor, low power, heater, aspirated radiation shield, maintenance-free operation, open communication protocol
  • RS485 with supported protocols UMB-Binary, UMB-ASCII, Modbus-RTU, Modbus-ASCII, XDR and optional SDI-12
FEATURES
  • All-in-one housing concept of a compact weather sensor combining 6 measurement parameters in one housing with only one cable connection
  • Integrated Kipp & Zonen CMP3 PyranometerÂ
  • 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
Specs
General
Dimensions Ø approx. 150 mm, height approx. 332 mm
Weight Approx. 1.5 kg
Interface RS485, 2 – wire, half – duplex
Power supply 4…32 VDC
Operating temperature -50…60°C
Operating rel. humidity 0…100 % RH
Heating 20 VA at 24 VDC
Cable length 10 m
Protection level housing IP66
Mast mounting suitable for Mast diameter 60 – 76 mm
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)
Wind direction
Principle Ultrasonic
Measuring range 0 … 359.9°
Unit °
Accuracy < 3° RMSE > 1.0 m/s
Wind speed
Principle Ultrasonic
Measuring range 0 … 75 m/s
Unit m/s
Accuracy ±0.3 m/s or ±3 % (0…35 m/s) ±5 % (>35 m/s) RMS
Resolution 0.1 m/s
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°

 

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