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
- Advantages
- Examples of use
- Product variants
- App Installation
- Resources
- Videos
- Sensors
- Accessories
- Technical Data
- FAQs
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:
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EU declaration of conformity - Lufft MARWIS and StaRWIS
EU declaration of conformity - Lufft MARWIS and StaRWIS
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RoHS - MARWIS / StaRWIS
RoHS - Declaration of Conformity / Konformitätserklärung - MARWIS / StaRWIS
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Whitepaper - Road Weather Selection Guide
The Whole World of Road Weather Monitoring
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| General | |
| 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% |
| Friction | |
| Measuring range | 0...1 |
| Resolution | 0.01 |
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).
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.
