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Visibility Sensor VS2k-UMB

New product version of the known Lufft VS20 visibility sensor with a measurement range of 10...2000m, easy calibration functionality, sea waterproof housing and (active) spider defence

The VS2k visibility sensor measures visibility up to 2000m, ideal for road traffic applications on motorways, highways or bridges. A calibration device is available (optional).
The VS2k-UMB is configured via the software UMB Config Tool:

  • Reading / Changing of the current configuration,
  • calibration,
  • polling of the current measurement values,
  • the software allows configurations to be loaded and stored.

The measurement data is available for further processing in the form of the standard protocol Lufft UMB.

ASD = Active Spider Defense: The built-in vibrating motor ensures at irregular intervals that the VS2k visibility sensor is not so prone to spiders. The construction of VS2k also reduces the frequency of maintenance.

  • Visibility (measuring range 10 ... 2000 m, resolution 1 m)
  • 45° forward light scattering
  • suitable for extreme ambient conditions, active spider defence, seawater resistant, compatible interfaces
  • RS-485, analogue output
  • 8366.U70
Request a quote or advice
  • First and only visibility sensor with active spider defense
  • Measurement range of 10 … 2000 m, ideal for traffic applications
  • Sharp measurement resolution of 1 m
  • Easy and smart calibration thanks to a calibration kit (optional)
  • Forward light scattering technique
  • Long life time thanks to sea waterproof housing
  • Open and free to use communication protocol for easy integration in excisting systems

The robust and sea water proved visibility sensor is designed for professional meteorological applications in all climate zones, onshore as well as offshore. It delivers reliable data, even in extreme ambient conditions.

Examples of Use:

  • Road Weather Information System for road and traffic control systems
  • Weather stations at marinas and onboard ships
  • Wind turbine control
EU declaration of conformity - Lufft VS2k
EU declaration of conformity - Lufft VS2k
Firmware - Lufft - VS2k / VS20k
Version 22
Manual - Lufft - VS2k/VS20k (EN)
Manual - Lufft UMB Config Tool (EN)
Manual - Lufft UMB Protocol (EN)
Quickstart - Lufft - VS2k/VS20k - Visibility - Sensor (DE/EN)
Road Weather Maintenance Checklist
Road Weather Maintenance Checklist
Software - Lufft - ConfigTool .NET
Version 1.6
Software - UMB Config Tool
Video - Lufft: a passion for precision (Corporate Video)
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Dimensions 500x230x80mm
Weight Approx. 4kg
Protection type IP66
Interfaces RS485 (2-wire, half duplex); Analogue output (4 - 20mA)
Value update 1/minute
Included in delivery Connection cable
Cable length 10m
Storage conditions
Admissible storage temperature -40...70°C
Operating rel. humidity 0...100% RH (non condensing), 0 ... 98% (inside packaging)
Operating conditions
Operating temperature -40...60°C
Operating rel. humidity 0...100% RH
Power supply 20...30VDC; typical 24VDC
Power consumption < 200mA (motor running and current outputs active), about 100mA in normal mode and RS485 output
Power consumption 3W (typical), 10W (max.)
Protection class III (SELV)
Principle 45° forward scattering
Measuring range 10 ... 2000 m
Measuring resolution 1 m
Unit m
Accuracy ±10% visibility
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