Contrast sensors

Your Benefits

  • Able to process all packaging materials (yellow mark/white background), resulting in high machine throughput
  • Reliable operation, even with jittering and high gloss materials
  • High positioning accuracy improves packaging quality
  • Simple teach-in and highly visible light spot ensure easy setup
  • A range of sensing distances, light spot directions and 90° rotatable plug enables optimal integration
  • Interchangeable lenses for maximum mounting flexibility


KT5-2 contrast sensors are ideal for high-precision contrast detection, such as detecting marks on high-gloss materials. Thanks to the 3-color LED, the sensors are able to activate the best-possible emitted light source for each contrast. The device also offers various possibilities for adapting the switching point to the application via teach-in process or potentiometer. The sensor defines all necessary parameters automatically. The sensor then determines the ideal switching threshold from the two gray values detected. High-precision contrast detection, automatic gloss adaptation for highly reflective objects, a sensing distance of 10 mm, 20 mm and 40 mm, switching frequency of 10 kHz and individual alignment and mounting options make the device suitable for a wide range of tasks. Simple mounting is also ensured – the M12 plug connection can be rotated 90°.

At a glance
  • Best contrast resolution thanks to RGB LED technology
  • Intuitive 10-segment bar display indicates the detection reliability
  • Dynamic or static teach-in method or manual potentiometer
  • Switching frequency of 10 kHz
  • Automatic gloss adjustment for highly reflective materials
  • Various sensing distances and light spot directions
  • M12 plug can be rotated 90°


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 distance

    20 mm 1)

    10 mm 1)

    40 mm 1)

    50 mm 1)

    200 mm 1)

    Dependent on the fiber-optic cable

    Type of light

    LED 2)

    LED 2)

    LED 2)

    LED 2)

    Light spot size

    1.5 mm x 5.5 mm

    1.2 mm x 4.2 mm

    1.1 mm x 4.2 mm

    4.2 mm x 1.2 mm

    10 mm x 35 mm

    Switching frequency10 kHz 3)
    Response time50 µs 4)
    Switching output




    Static 2-point teach-in

    Static 2-point teach-in with manual fine adjustment

    Teach-in dynamic

    Automatic contrast detection

    1-point teach-in

    Connection typeMale connector M12, 5-pin / male connector M12, 4-pin
    • 1) From front edge of lens.
    • 2) Average service life: 100,000 h at TU = +25 °C.
    • 3) With light/dark ratio 1:1.
    • 4) Signal transit time with resistive load.
All technical data can be found accompanying the individual product