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Key features


  • All-in-one housing concept of a compact weather sensor combining several 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 data loggers 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


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 and air pressure. One external temperature sensor is connectable.

Lufft WS400-UMB Smart Compact Weather Station

Excluding VAT
  • General

    Dimensions Ø ca. 150 mm, height ca. 280 mm
    Weight Approx. 1.3 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)
    Power consumption 20 VA (heater)
    Operating temperature -50...60 °C (with heater)
    Operating rel. humidity 0...100 % RH
    Cable length 10 m
    Protection level housing IP66
    Mast mounting suitable for Mast diameter 60 - 76 mm


    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)

    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
  • 5-6 Weeks

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