Contrast sensors

The sensor for optical line guidance

Your Benefits

  • Rugged and accurate, insensitive to ambient light, contamination or surface defects
  • Independent of base material or color
  • Simple line shifts and route changes by attaching conventional adhesive tape
  • Small curve radii of up to 0.5 m possible
  • Large reading field enables flexible line shifts (branches, junctions)
  • Reading bar codes makes it possible to transmit distance information or drive commands and simplifies vehicle control
  • Cost efficient compared to camera solutions
  • Low installation costs


The sensor for optical line guidance

The OLS is a line guidance sensor based on luminescence technology. It detects conventional luminescent adhesive tape regardless of the background, contamination or surface defects and reliably outputs the deviation from the center of the lane. Lane shifts can be made flexibly with adhesive tape and are also possible in small curve radii of up to 0.5 m. In addition, the OLS offers the option of reading 1D codes and thus transmitting various pieces of route information and drive commands in the event of an overrun. A CANopen, RS-485 or IO-Link interface enable simple installation and commissioning. The OLS is therefore the most cost-effective solution for line guidance with a focus on ruggedness and flexibility.

At a glance
  • Detection of luminescent adhesive tape
  • Very high signal-to-noise ratio (~1:1,000)
  • 180 mm reading field (up to 3 lanes can be read)
  • Output of deviation from lane center point, lane width and read-out of barcodes
  • Able to withstand ambient light, contamination and gloss
  • Compensation for surface defects
  • Measurement accuracy: ± 1 mm
  • CANopen, RS-485 or IO-Link


Industry 4.0 is picking up speed: Automated flexibility for mobile vehicles and carts

Our modular solutions portfolio for mobile platforms now makes it possible to implement line guidance, navigation, positioning, environmental recognition, security and load handling with ease.

Learn more

Reliable lane detection

The rugged solution thanks to luminescence

Based on the luminescence principle, the OLS optical line guidance sensor offers increased ruggedness. The OLS can be used with one and the same lane regardless of the surface type and stably detects the lane even when soiled or slightly damaged. This reduces maintenance costs and downtimes of the vehicles.

The rugged line guidance sensor detects the lane even when slightly damaged or soiled

The OLS stably and reliably detects the lane regardless of the surface type

Reliable lane detection, able to withstand contamination and damage: The OLS offers more process reliability thanks to luminescence technology.

Fully flexible

Flexible line guidance through large reading field and 1D code reading function

Thanks to its large reading field of 180 mm, the OLS is able to stably master curved trajectories even at high speeds and small radii. Even for lane branches or merges it can read up to three lanes. The 1D code reading function allows positioning based on landmarks or the transmission of route commands.
The OLS reads up to three lanes simultaneously and outputs the lane midpoint and lane width. This enables it to correctly detect the branching of a lane or merging of several lanes
The sensor reads 1D codes without difficulty while passing over them, and transmits the four-digit numeric value in the process data to the controller. This makes the use of additional RFID tags unnecessary

Fully flexible line guidance thanks to the large reading field; the simultaneous detection of up to three lanes and the 1D code reading function make further landmarks unnecessary and save time in routing.


Technical overview

  • Technical data overview

    Technical data overview

    Dimensions (W x H x D)31 mm x 62 mm x 52.5 mm
    Sensing distance100 mm
    Type of light

    LED 1)

    LED 1)

    Light spot size180 mm x 9 mm 2)
    Switching outputPush-pull: PNP/NPN
    Connection typeMale connector M12, 5-pin
    Communication interface




    • 1) Average service life: 100,000 h at TU = +25 °C.
    • 2) Field of view line +-90mm, field of view code +-50mm.
All technical data can be found accompanying the individual product