Extractive visibility measurement for increased safety in tunnels
  • At a glance
    • Regular functional test with contamination measurement
    • Linearity test can be carried out with filter set
    • Internal purge air for long intervals between cleaning
    • Maintenance signal (filter and cleaning)
    • Logbook function
    • Extendable with various interfaces or I/O modules (e. g., PROFIBUS, Ethernet, analog module, etc.)
    Your Benefits
    • Very reliable operation due to full self-test
    • Cost-effective and fast commissioning (no optical alignment required on site)
    • Flexible electrical integration thanks to the easy connection of additional interfaces or I/O modules
    Extractive visibility measurement for increased safety in tunnels

    The VICOTEC450 provides an optimal solution for visibility measurement if

    • Fixtures in the tunnel tube are not permitted or not possible due to lack of space
    • Fog should not be included in the visibility measurement.

    The VICOTEC450 draws air from inside the tunnel, heats it above the dew point, and determines the visibility with a high level of accuracy using scattered light technology. It regularly and automatically carries out a functional test including the function of the laser and receiver as well as the contamination of the optics. Maintenance requirements for cleaning and filter exchange are automatically registered and signaled in time by the VICOTEC450 due to contamination check and measurement of the air flow rate (optional).

  • Please note: The exact device specifications and performance data of the product may deviate from the information provided here, and depend on the application in which the product is being used and the relevant customer specifications.

    • VICOTEC450 system
      Measured valuesVisibility (K-value)
      Measurement principlesScattered light forward
      Spectral range640 mm ... 660 mm
      Laser, protection class 2, power < 1 mW
      Gas flow rate30 l/min ... 35 l/min
      Measuring ranges
      K-value0 ... 15 km⁻¹ / 0 ... 5,000 km⁻¹
      Temperature–50 ... +250 °C
      Response time (t90)0 s ... 600 s
      Freely adjustable, without measuring delay due to suction line
      Temperature± +2 °C
      ResolutionVisibility (K-value): 0.1 km⁻¹
      RepeatabilityVisibility (K-value): ± 2 % of measuring range full scale
      Ambient temperature–30 °C ... +55 °C
      Storage temperature–40 °C ... +60 °C
      Electrical safetyCE
      Enclosure ratingIP66
      Dimensions (W x H x D)300 mm x 340 mm x 215 mm (for details see dimensional drawings)
      Weight12 kg
      Power supply
      Voltage90 ... 250 V
      Frequency50 Hz / 60 Hz
      Power consumption≤ 35 W
      Test functions

      Automatic self-test

      Contamination limits: at 30% warning, at 50% failure

      Manual linearity test with reference filter

      OptionsTemperature measurement
    • MCU control unit
      DescriptionUnit to control the system components and to evaluate and output the data provided by them
      Enclosure ratingIP66
      Analog outputs1 output:
      0/2/4 ... 20 mA, 750 Ω
      Electrically isolated, additional outputs if using I/O modules (option)
      Analog inputs2 inputs:
      0 ... 20 mA
      Not electrically isolated, additional inputs if using I/O modules (option)
      Digital outputs5 relay contacts:
      + 48 V AC, 1 A
      Potential-free, for status signals, extendible by additional I/O modules
      Digital inputs4 potential-free contacts:
      Additional inputs if using I/O modules
      Type of fieldbus integration

      TCP (via optional interface module)

      RTU RS-485 (via optional interface module)

      Type of fieldbus integrationVia optional interface module
      Ethernet TCP/IP
      Type of fieldbus integrationVia optional interface module
      FunctionConnection to SOPAS ET software or OPC server
      Type of fieldbus integrationRS-485 (via optional interface module)
      FunctionConnection to SOPAS ET software
      FunctionConnection to SOPAS ET software

      LC display

      Status LEDs: "Power", "Maintenance" and "Failure"

      OperationVia LC-display or software SOPAS ET
      Dimensions (W x H x D)210 mm x 340 mm x 125 mm
      Weight≤ 5 kg
      Power supply
      Voltage90 ... 250 V AC
      Frequency50 Hz / 60 Hz
      Power consumption≤ 50 W

      Interface module(s)

      I/O module(s)

    Technical drawings

    MCU-N control unit, wall-mounting enclosure, compact version (for non-hazardous areas only)
    MCUP control unit, 19″-rack enclosure (for non-hazardous areas only)
    connection unit, stainless steel version
    connection unit, standard version
    mounting plate
    cover for connections
    cover for connections, with air inlet at the side
    air inlet with protective grading for wall mounting
    VICOTEC450 measuring unit

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