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WS800-UMB Smart Weather Sensor

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

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.

  • temperature, relative humidity, air pressure, wind direction, wind speed, precipitation intensity, precipitation quantity, radiation, lightning strikes
  • Ultrasonic/Wind, NTC/T, Capacitive/RH/Pressure, Thermopile/Radiation, Radar/Precipitation, radio wave emission/Lightning strikes
  • First and only compact all-in-one weather sensor with lightning detection, 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 SDI-12
  • 8381.U01
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Advantages of the Smart Weather Sensor WS800

  • First and only all-in-one compact weather sensor with lightning detection
  • 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
  • Integrated heater that can be switched on if there is danger of frost

Examples of use of the Smart Weather Sensor WS800

The robust and maintenance-free smart weather sensor WS800 is designed for professional meteorological applications in all climate zones. It delivers reliable data, even in extreme ambient conditions.

Examples of use:

  • Weather observation for road and traffic control systems
  • Automatic weather station / Automatic weather sensor (AWS)
  • PV-Monitoring / Solar Monitoring on photovoltaic farms
  • Hydro-meteorological stations
  • Weather observation for building automation
  • Weather stations at airports, marinas and onboard ships

More about lightning detection of the WS800 Weather Sensor

WS800-UMB includes lightning detection by an integrated sensor analysing the radio wave emission of lightnings. It delivers a count of recognized lightnings.

The sensor analyses spectrum and wave form of the received signal to suppress the detection of man made electrical discharges.

Brochure - Lufft - Weather Critical Operations (EN)
Traffic weather, renewable energies and more
EU declaration of conformity - Lufft WS Family
EU declaration of conformity - Lufft WS Family
Firmware - WSXXX
For WSXXX device versions ≥30 (see serial number) / Für WSXXX Gerätenummern ≥30 (siehe Seriennummer)
Firmware - WSXXX
For WSXXX device versions 1 - 29 (see serial number) / Für WSXXX Geräteversionen 1 - 29 (siehe Seriennummer)
Leaflet - Product Family of smart Weather Sensors - Lufft WSxxx Series
Manual - Lufft UMB Config Tool (EN)
Manual - Lufft UMB Protocol (EN)
Manual - Lufft WSxxx weather sensor (EN)
V41
Manuel - Manuel - Lufft WSXXX Météo Capteurs (FR)
V37
Quickstart - Lufft WSXXX - Smart Weather Sensor Family (DE/EN)
Software - Lufft - ConfigTool .NET
Version 1.4
Software - UMB Config Tool
Video - Lufft: a passion for precision (Corporate Video)
Video - WS product family - Integration of external sensors
Video - WS product family: Our modular concept of the WS-family
Download as PDF
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 40 VA at 24 VDC
Cable length 10 m
Protection level housing IP66
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
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 intensity
Resolution 0.1 mm/h
Precipitation quantity
Resolution 0.01
Reproducibility Typical >90%
Measuring range drop size 0.3...5 mm
Type of precipitation Rain/snow
Radiation
Unit W/m²
Accuracy 5%
Response time (95%) < 1s
Spectral range 300 to 1100 nm
Measuring range 1400 W/m²
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WS product family: Communication after protocol change

How to communicate with a WS-Sensor and the UMB-config-Tool if the protocol was changed for example to Modbus or SDI-12?

After a Reset ( switching On/Off the sensor) every WS-Senor will start up for the first 5 seconds in UMB-protocol and the standard baud rate of 19200Bd. Independend to the configured protocol and baudrate settings of the WS-Sensor.

In this first 5 Seconds you will be able to connect via UMB-config-Tool to the WS-Sensor after this first command was send the UMB-protocol will stay for 10 minutes after that it switches back to the original configured protocol. This Time will always be extended to 10 minutes if a new UMB command was send.

WS product family: SDI-12 wiring plan for Device version >= 42

How to connect a WS-sensor with a device version >= 42 (hardware version >=14) to a SDI-12 system?

The wiring plan has changed compared to the wiring plan of older WS-Sensor device versions.
The new wiring plan is:

  • +VDD = brown
  • GND = white
  • SDI12_Signal = yellow
  • SDI12_GND = white

This is also mentioned as a note in the latest WS-sensor manual in the section 8 Connections

WS800: What is the max. radius a lighting can be detected from the WS800?

The WS800 uses a integrated electronic chip to detect the lighting. The max. radius of this detection is approximately 10 Km.

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