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MARWIS-UMB - 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. 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.
  • Layer thickness of water, snow and ice, surface conditions (dry, damp, wet, snow, ice), friction, optional: road surface temperature
  • Weighing principle
  • 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
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  • Accurate measurement: precipitation accuracy within 0.004 inches with accumulation and intensity readings and filter algorithms to compensate for wind, temperature, and evaporation
  • Virtually maintenance-free operation: lifetime factory calibration, drift-free measurements, and robust protective housing eliminate field visits for instrument service
  • Multiple communication interfaces: SDI-12, RS-485, and Pulse Output options
  • Solar panel power options make the instrument ideal for remote locations
  • Easy software setup and a USB interface for communication with computer
  • Wind protection shield available for particularly exposed locations
  • Heated ring option available to prevent the accumulation of snow on the sensor
  • Easy installation onto 4" pipes
  • Precipitation Measurement:  Continuous, real-time measurement of rain, snow, hail, and sleet in all monitoring environments, even remote environments without power supply
  • Monitoring Road Conditions: precipitation amount and composition are combined with general visibility measurements to provide an accurate picture of road conditions
  • Early Flood Warning: when combined with water level sensors, the Pluvio2  is the central component in an early flood warning system
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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, critically wet
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 %
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
Unit µm
Resolution 1 µm
Accuracy 10%
Ice Percentage
Measuring range 0 ... 100 %
Unit %
Resolution 1%
Measuring range 0...1
Resolution 0.01
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