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MARWIS - Mobile Advanced Road Weather Information Sensor

MARWIS is the first road and runway weather sensor detecting road conditions, temperatures, friction and other parameters mobile and in real time from driving vehicles.

The mobile road weather sensor MARWIS turns vehicles into driving weather stations by detecting several critical road and runway weather parameters. It can be installed on vehicles with a distance of 1 - 2m above the surface and delivers information about temperatures, waterfilm heights, dew points, road conditions (dry, moist, wet, snow, ice), ice percentages, rel. humidity and friction with a frequency of up to 100 times per second and a max. output rate of 10 Hz. It serves as an important decision support with regard to preventive gritting. Due to the open interface protocols, MARWIS can be easily integrated into existing winter maintenance monitoring networks. Similarly, the mobile road sensor can communicate directly with the control system on gritting vehicles. The measurement data output supports the protocol UMB binary.

  • Road condition (dry, moist, wet, ice, snow, slush, chemically wet), road surface temperature, ambient temperature, water film height up to 6mm, dew point temperature, relative humidity, ice percentage, friction (calculated)
  • Optical LED transmitters, photo receivers, pyrometer, infrared
  • Mobile, plug and play, 100 measurements per second with max. output rate of 10Hz, multifunctional, real time thermal mapping, wireless data transfer
  • Bluetooth, RS485, CAN-Bus
  • 8900.U03, 8900.U04
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Advantages of the mobile road and weather sensor MARWIS:

  • Easy data transfer via Bluetooth, RS485 or CAN-Bus
  • Dynamic mobile data in real time and 100 times per second and a max. output rate of 10Hz.
  • Multifunctionality
  • Measurements both on the ground and in the ambient air
  • Easy to install and to clean
  • Free MARWIS app for calibration, data view as well as transfer available on Google Play and iTunes
  • One or two meter version for different vehicle types

Examples of use of the mobile road and weather sensor MARWIS:

  • Decision support for winter maintenance operators on roads, motorways, highways (municipalities, federal states and provinces)
  • Decision support for the de-icing of runways (higher efficiency)
  • As important part of the IDS (Ice Detection System) in form of a RCC (Runway Condition Code), water film height (aqua-planning risk) and friction detector on airports (digital alternative to mechanic grip testers)
  • For smart city applications
  • For weather data collection and weather forecast model improvements

Product variants of the mobile road and weather sensor MARWIS:

The mobile road and weather sensor MARWIS is available in two different product versions, which is needed to cover all possible mounting positions on different vehicles:

  • Version 1: Approx. 1m measurement distance to road surface (Article no. 8900.U03)
    Often used on trucks with mounting on height of the wheelhouse
  • Version 2: Approx. 2m measurement distance to road surface (Article no. 8900.U04)
    Often used on cars with MARWIS mounting on the roof of the car

App Installation

In addition to the PlayStore, our App is available for download via HTTP in APK format.

How to install Android APK from other sources than Google Play Store:

Find out here

Download the App


Android APK from other sources than Google Play Store - MARWIS
Brochure - Lufft - MARWIS (EN)
EU declaration of conformity - Lufft MARWIS and StaRWIS
EU declaration of conformity - Lufft MARWIS and StaRWIS
Firmware - Lufft - MARWIS / StaRWIS
Version 44
Leaflet - Lufft - Roadway Monitoring on Parkdecks with MARWIS
Manual - Lufft - MARWIS (EN)
Manual - Lufft UMB Protocol (EN)
Manual MARWIS iOS App (EN)
Manual MARWIS iOS App (EN)
RoHS - Declaration of Conformity / Konformitätserklärung - MARWIS / StaRWIS
Software - Lufft - ConfigTool .NET
Version 1.6
Whitepaper - Road Weather Selection Guide
The Whole World of Road Weather Monitoring
Video - Lufft: a passion for precision (Corporate Video)
Video - MARWIS iPad App for mobile road sensor MARWIS
Video - MARWIS on Tour - The mobile weather sensor from Lufft - Product movie
Video - MARWIS Tutorial: From installation to start-up | First Steps
Download as PDF
Dimensions Height approx. 110 mm, width approx. 200 mm, depth approx. 100 mm
Weight 1.7 kg
Admissible storage temperature -40...70 °C
Operating rel. humidity <95 % relative humidity non-condensing
Operating voltage 10...28 VDC on the sensor
Power consumption Approx. 3VA without heating, 50VA with heating
Operating temperature -40...60 °C
Operating rel. humidity 0...100 % RH
Protection type IP68
Surface conditions Dry, damp, wet, snow-/ice-covered, chemically wet, slush
Admissible height above absolute altitude 3000 m
Interface RS485, 2 wire, half duplex, bluetooth, CAN
Road surface temperature
Principle Optical
Measuring range -40...70 °C
Unit °C
Accuracy ± 0.8 °C @ 0 °C
Resolution 0.1 °C
Ambient temperature
Measuring range -50...70 °C (°F switchable)
Unit °C (°F switchable)
Resolution 0.1 °C
Relative air humidity
Measuring range 0...100 %
Unit %
Resolution 1 %
Principle passive, calculated out of air temperature and humidity
Relative humidity above road surface
Measuring range 0 ... 100 %
Unit %
Resolution 0.1 %
Principle passive, calculated out of air temperature and humidity above road surface
Dew point temperature
Measuring range -50 ... 60 °C
Unit °C
Resolution 0.1 °C
Principle passive, calculated out of air temperature and humidity
Accuracy 1.5 °C @ temperature of 0...35 °C
Waterfilm film height
Principle Optical
Measuring range 0 ... 6000 µm
Max. WFH is only achieved with concrete underground. For asphalt, the maximum measurable water film height is smaller and depends on the distance to the ground.
Unit µm
Resolution 1 µm
Accuracy 10%
Ice Percentage
Measuring range 0 ... 100 %
Unit %
Resolution 1%
Measuring range 0...1
Resolution 0.01
Download as PDF

MARWIS: What are the first steps to use MARWIS?

In this short movie our service expert Manuel Kreissig shows you the first steps to install and run the mobile road sensor MARWIS with your car.

To the MARWIS Tutorial: From installation to start-up

MARWIS CloudGate: How do I setup the MARWIS CloudGate box?

In a short tutorial our technician Manuel Kreissig shows you which first steps you have to take to setup the CloudGate box (SIM card insert and wiring).

Watch CloudGate tutorial

MARWIS: How large is the measuring spot?

The measuring spot of the mobile sensor is approx. 10cm x 10cm in the specified distance. This applies to both the 1m and the 2m version.
If the distance deviates from this, the measuring spot becomes correspondingly larger (with larger distance) or smaller (with smaller distance).
However, it should also be noted that the area of the transmitter and the receiver move further and further apart, as the MARWIS "squints" a little.