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Non Invasive Road Sensor NIRS31-UMB

The NIRS31-UMB is a non-invasive road weather sensor with optical principle. It is mounted several meters above the ground and can even monitor bridges...

The NIRS31-UMB is a non-invasive road weather sensor working with optical principle and is mounted several meters above the surface at bridges or masts. It measures surface conditions such as wetness, ice, snow, or frost as well as water film heights, ice percentage in water and freeze point temperature. Through these measurements it generates the friction coefficient on the road or runway.

  • Layer thickness of water, snow and ice, surface conditions (dry, damp, wet, snow, ice), friction, road surface temperature, saline concentration
  • Optical principle, pyrometer
  • non-invasive, easy to install and add to existing measurement networks, friction measurement, real time data providing
  • UMB-binary, SDI-12, ASCII-UMB, analog outputs in combination with digital-analog-converter DACON8-UMB
  • 8710.UT01
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  • Non-invasive and easy to install
  • Open UMB protocol
  • Can be even mounted on bridges
  • Onsite calibration
  • Real-time data
  • Analoge outputs in combination with 8160.UDAC
  • For winter maintenance operators as part of road weather stations on roads, motorways, highways (municipalities, federal states and provinces)
  • For smart cities
  • For airports, installed on runway as important part of the IDS (ice detection system) and water film height detection (aqua-planning risk)
EU declaration of conformity - Lufft NIRS31
EU declaration of conformity - Lufft NIRS31
Firmware - Lufft - NIRS31-UMB
Version 29
Manual - Lufft - NIRS31 - UMB (EN)
Road Weather Maintenance Checklist
Road Weather Maintenance Checklist
Whitepaper - Road Weather Selection Guide
The Whole World of Road Weather Monitoring
Video - NIRS31-UMB Produktfilm Kurzfassung/Product film short version
Video - NIRS31-UMB: Must-Know about contact - free road conditions measurements
Video - ViewMondo Tutorial: The Management Software for Road Weather Stations
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Dimensions H. ca. 425 mm, W. ca. 225mm, D. ca. 285mm
Weight 10 kg
Storage conditions
Permissible ambient temperature -40...70°C
Permissible relative humidity 0 ... 95% R.H. non-condensing
Operating conditions
Permissible relative humidity 0 ... 100% R.H.
Operating voltage 24 VDC ±10%
Power consumption Approx. 40VA
Operating temperature -40...60°C
Protection type IP65
Layer thickness
Layer thickness Water, Snow, Ice
Principle Optical
Measuring range 0...2mm (snow 0 ... 10 mm)
Resolution 0.01mm
Surface conditions
Surface conditions Dry, Damp, Wet, Snow, Ice
Friction Measurment range 0...1 (critical ... dry)
Road surface temperature
Principle Pyrometer
Measuring range -40 bis +70°C
Accuracy 0,8°C
Resolution 0,1°C
Saline Concentration
Measurement process Spectroscopic
Measuring range 0% ... 100%
Resolution 0.1%
Sampling rate <1 minute
Units %
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