Contrast sensors

Your Benefits

  • Versatile use for various distances from sensor to sensing object
  • Precise detection of the smallest marks and objects, e.g. 1 x 1 mm²
  • Reliable operation even in the event of object jitter
  • Access to the sensor with the controller saves the machine operator time and effort during parameterization
  • Individualized parameterization and setting specifically tailored to the application
  • Automatic drift correction enables maximum production reliability, for example in the event of weakening print marks
  • Reliable operation with high-gloss foils ensures high machine availability


The KT8 sensor family features two variants. The first variant, the KT8L, enables very reliable detection of the smallest contrast marks and objects thanks to the precise laser. Lasers are used in contrast sensors for long sensing distances (up to 800 mm) or for detecting very small objects. The KT8L gives you both! Thanks to the two light spot sizes, the smallest elements can be detected with < 0.3 mm and larger objects and marks with approx. 3 mm. 3-color LED, gloss adjustment, automatic drift correction and short response times are what make this device the ideal product.

At a glance
  • Laser variant with sensing range from 30 mm bis 800 mm
  • Very small and precise laser light spot (class 2)
  • High switching sequence of 17 kHz
  • Display of detection reliability via control panel
  • Very precise light spot


KTS and KTX - The next generation of contrast sensors

Click here for more information:

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, red 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
    Communication interface-
    • 1) From leading 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