Fully automatic print mark detection

Fully automatic print mark detection

Automatic detection of print marks makes the CR100-PM an easy-to-use print mark sensor. Due to the perceptive color processing the sensor can recognize print marks with a low contrast to the background. Thanks to the adaptive control system the sensor can adjust its threshold to fluctuating contrast of the print marks. This ensures reliable detection also in applications with difficult ambient conditions. Its independence from ambient light and the integrated stabilization channel technology CROMLASTAB® ensure reliable operation during the whole life cycle.


The functional principle of the CR100-PM is based on the three range procedure. The measuring light is assessed with the tristimulus value functions and assigned to the three wave length ranges red, green and blue. Through the assessment with these tristimulus value functions the sensor is able to perceive colors similar to the human eye.
The sensor contains an own white light source clocked with a frequency of up to 10 kHz. Sampling takes place in both, the light and the dark phase, so that the sensor is independent from ambient light.

The operation of the sensor is comfortable and easy. The user does not have to teach in color marks, as they are automatically recognized and stored by the sensor. After a start signal the sensor scans the background. Deviations are automatically recognized as marks. Corresponding to the number of output channels it is possible to teach in and display 4 different color marks automatically.  


  • Quick response time from 50 µs
  • 4 color marks can be scanned
  • Fully automatic teach-in of color marks
  • Easy adjustment to the size of the mark by optical fibers and optics
  • Triggering of the start signal via trigger or button
  • PC software CR-tool and Average Monitor for parameterization and monitoring 

Technical Data

Sensing Channels

  • 1
  • 1 Internal stabilization channel

Drift stabilization

CROMLASTAB® can be switched off

Receiving detector

Three range photo diode

Sensitivity steps

8 (1x, 4x, 20x, 40x, 80x, 200x, 400x, 800x)

Receiving signal resolution

3 x 4096 steps

Object illumination

  • Power white light LED
  • Adjustable (4096 steps)
  • Can be switched off


9 LEDs for switching outputs and status


3 Buttons for teach-In

Color resolution

ΔELab < 1


0 ms ... 65535 ms

Color output channels

4 (up to 15 with binary encoding)

Protection standard

IP 54

Power supply

18 ... 28 VDC, max. 500 mA

Case temperature during operation

-10 °C ... 55 °C

Coupling in signal path

Via optical fiber, optional focus optics


50 mm x 50 mm x 21 mm


80 g


Dr. Gundolf Geske

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