Contrast sensors

Your Benefits

  • Wide selection of varying distances, depending on the application
  • Precise detection of the smallest marks and objects, e.g., 1 x 1 mm²
  • Reliable operation, even with unsteady objects
  • Easy integration into machine designs, thanks to standard CAN protocol
  • Access to the sensor via the control system saves the machine operator time and effort during configuration
  • Individual, application-specific configuration and settings
  • Automatic drift correction ensures high production reliability with faded print marks and other difficult to detect marks
  • Reliable operation, even with high-gloss reflective surfaces, increasing throughput


The KT8 sensor family has two variants. The first, KT8L, supports extremely reliable detection of the smallest contrast marks and objects thanks to its precise laser. Lasers are used in contrast sensors for long sensing distances (up to 800 mm) or to detect very small objects. The KT8L supports both. Two light spot sizes are available: <0.3 mm for detecting the smallest objects and 3 mm for larger objects and marks. The second variant, KT8 CAN, is characterized primarily by its ability to communicate. This enables users to adjust the sensor to meet their specific requirements and easily integrate additional functions into their machines. Virtually any number of parameter sets (i.e., taught-in sensor settings) can be stored in the machine controller via the CAN interface, e.g., for different packaging or prints. In addition, important process data such as contamination or current switching thresholds can be queried via the CAN interface. This product is topped off by a 3-color LED, gloss adaptation, automatic drift correction, and fast response times.

At a glance
  • Laser version offers sensing distances of 30 mm to 800 mm
  • Very small and precise laser light spot (Class II)
  • Fast switching frequency of 17 kHz
  • Detection reliability displayed in the bar graph display
  • CAN interface version for parameter setup, diagnostics and function selection
  • Very precise light spot


KTS and KTX - The next generation of contrast sensors

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KTX Prime

KTS Prime

KTS Core

Technical overview

  • Technical data overview

    Technical data overview

    Dimensions (W x H x D)30.4 mm x 53 mm x 80 mm
    Sensing distance150 mm 1)
    Type of lightLaser 2)
    Light spot size

    Ø 0.3 mm 3)

    Ø 3 mm 3)

    Switching frequency17 kHz 4)
    Response time30 µs 5)
    Switching output




    Static 2-point teach-in

    Dynamic teach-in (min/max)

    Connection typeMale connector M12, 5-pin
    • 1) From front edge of lens.
    • 2) Average service life: 50,000 h at TU = +25 °C.
    • 3) At focal point = sensing distance 150 mm.
    • 4) With light/dark ratio 1:1.
    • 5) Signal transit time with resistive load.
All technical data can be found accompanying the individual product