Contrast scanners

Contrast scanners

The contrast makes the difference

This sensor type can use various light sources - such as white light, laser-generated red light or RGB light - to very precisely detect and compare contrasts and report the results to the process with minimal signal jitter. Through the automatic selection of the right transmitter colors, various color or gray value combinations can be reliably detected


KRT 3B

The smallest of their type, also with IO-Link

The contrast scanners of the KRT 3B series distinguish between grayscale values, enabling them to detect minimal contrasts. As a result, a check can be performed for the presence of text or imprints or so-called marks detected.

  • Scanning range 14.5 mm/ 60 mm (laser)

  • Multicolor (RGB), white or laser light

  • Various teach-in processes,

  • Switching-threshold correction via EasyTune

  • Min. response time 50 µs

  • Switching frequency up to 10 kHz

  • Pulse stretching

  • IO-Link interface

KRT 20

Ultrafast and high-resolving cut-marking systems

With jitter times <7 µs, with precise, round and small light spots, with memory bank administration and freely programmable interface, with perfect temperature compensation, these devices in a robust metal housing can handle even the fastest processes

  • Metal housing with interchangeable lenses

  • Scanning ranges of 12/20 mm and 50 mm

  • Very high resolution

  • Response time 10 ms

  • Switching frequency 50 kHz

  • Switching and analog output

  • Temperature compensation

  • Pulse stretching

  • Switching-threshold changeover

  • Freely programmable

  • Rectangular or round light-spot profile

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