Key features


  • Measuring wind direction and speed insusceptibly to bird nesting thanks to roofed construction
  • First and only all-in-one compact weather sensor with lightning detection
  • Built-in data pre-processing, universal interfaces and selectable output protocols
  • Maintenance-free operation – no moving parts that can wear out
  • Compatible with many commercially available Met/HydroMet data loggers and PLS systems thanks to an open communication protocol
  • Suitable for all climate zones; also for solar-powered automatic meteorological stations
  • Integrated heater that can be switched on if there is danger of frost


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, precipitation intensity, precipitation type, precipitation quantity, solar radiation, lightning detection, air pressure, wind direction and wind speed. One external temperature sensor is connectable.


Lufft WS800-UMB Smart Weather Sensor

  • General

    Dimensions Ø approx. 150 mm, height approx. 317 mm
    Weight Approx. 1.5 kg
    Interface RS485, 2 - wire, half - duplex
    Power supply 11...32 VDC
    Power supply 5...11 VDC (electronics with limited precision of measurements)
    Power supply 24 VDC +/- 10% (heater)
    Operating temperature -50...60°C (with heater)
    Operating rel. humidity 0...100% RH
    Cable length 10 m
    Protection level housing IP66
    Standards/Regulations Compliant to IEC 61724-1:2017 Class C
    Mast mounting suitable for Mast diameter 60 - 76 mm

    Lightning detection

    Lightning detection Number of lightning events
    Coverage area 5 - 10 km

    Air 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
    Resolution 0.1

    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

    Precipitation (liquid)

    Droplet size 0,3 … 5 mm
    Detection sensitivity 0,01 mm/h
    Particle velocity 0.9 ... 15.5 m/s
    Precipitation types rain/ snow
    Solid precipitation 5.1 ... ~30 mm
    Intensity range 0…200mm/h
    Intensity resolution 0.01 mm/h