Weather Stations

Lufft

WS502

Compact all-in-one weather sensor with measurement of temperature, relative humidity, air pressure, wind direction, wind speed and radiation.

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, Lufft 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
  • 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. 317 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
Protection level housing IP66
Mast mounting suitable for Mast diameter 60 – 76 mm
Radiation
Unit W/m²
Accuracy 5 %
Response time (95%) < 1 s
Non-stability(change/year) ±1 %
Non-linearity (0 to 1000 W/m²) ±1 %
Directional error (at 80° with 1000 W/m²) ±20 W/m²
Temperature dependence of sensitivity ±5 % (-10 to +40°C)
Tilt error (at 1000 W/m²) ±1 %
Spectral range 300…1100 nm
Measuring range 1400 W/m²
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

 

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