First and only compact all-in-one weather sensor with detection of lightning strikes.

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WS800 UMB Compact Weather Station

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.

Technical specification


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
Amount resolution 0.1 mm
Accuracy 20 % under laborary conditions
Reproducibility Typical >90 % under laborary conditions


Unit W/m²
Accuracy 5%
Response time (95%) < 1s
Spectral range 300 to 1100 nm
Measuring range 1400 W/m²