Air quality measuring devices

For ventilation control in road tunnels

Your Benefits

  • Direct measurement, nearly without time lag
  • Low operating and maintenance costs (especially for VICOTEC411)
  • Flexible system integration with analog outputs or PROFIBUS

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.


For ventilation control in road tunnels

The VICOTEC410 product family of compact analyzers detect measurands for visibility or carbon monoxide concentrations in road tunnels:

  • VICOTEC411 for determination of visibility
  • VICOTEC412 for measurement of CO concentration
  • VICOTEC414 for the simultaneous measurement of visibility and CO concentration.

These measurement devices request maintenance only when sensors are contaminated – reducing maintenance costs to a minimum. The VICOTEC411 monitors visibility in a tunnel and thus provides information on visibility conditions. A continuous, practically real-time control signal is used for serves for efficient ventilation control. The VICOTEC412 monitors CO pollution directly within the tunnel atmosphere. The VICOTEC414 offers a combined measurement device for simultaneous monitoring of visibility and CO concentration.

At a glance
  • Automatic adjustment function (AutoAdjust)
  • Contamination check
  • Menu-driven operation via evaluation unit

Spare parts


Service & Support

Technical overview

  • VICOTEC410 system

    VICOTEC410 system

    Measured valuesVisibility (K-value), CO
    Measurement principlesTransmittance measurement, Gas filter correlation
    Measuring distance
    10 m
    Measuring ranges
    Visibility (K-value)0 ... 15 km⁻¹
    CO0 ... 300 ppm
    Visibility (K-value)± 0.1 km⁻¹
    CO± 2 ppm
    Ambient temperature
    –30 °C ... +60 °C
    Storage temperature
    –30 °C ... +85 °C
    Electrical safetyCE
    Enclosure rating
    Analog outputs2 outputs:
    0/2/4 ... 20 mA
    Digital outputs3 relay contacts:
    125 V AC, 60 W / 150 V DC, 30 W
    Preset for failure, maintenance and alert
    Digital inputs1 input:
    5 V, 2 mA
    For external maintenance switch
    Type of fieldbus integrationRS-422
    OperationMenu-driven operation via control unit

    VICOTEC411 (only visibility)

    VICOTEC412 (only CO)

    VICOTEC414 (visibility and CO)

    Dimensions (W x H x D)
    Sensor190 mm x 259 mm x 539 mm (for details see dimensional drawings)
    RCU410 control unit254 mm x 349 mm x 122 mm (for details see dimensional drawings)
    Connection unit125 mm x 103 mm x 57 mm (for details see dimensional drawings)
    Connection unit with separate power supply163 mm x 111 mm x 57 mm (for details see dimensional drawings)
    Power supply
    Voltage190 V AC ... 260 V AC, ± 10 %
    95 V AC ... 130 V AC, ± 10 %
    Frequency50 Hz / 60 Hz
    Power consumptionVICOTEC411: ≤ 45 VA
    VICOTEC412: ≤ 80 VA
    VICOTEC414: ≤ 90 VA
    Corrective functionsZero point adjustment
    Test functionsReference point check
All technical data can be found accompanying the individual product