Distance compensated color sensor with patented CROMLADIST® - technology

Distance compensated color sensor with patented CROMLADIST® - technology
As with the other color sensors of the CROMLAVIEW® family the CR500 processes colors perceptually (i.e. according to human color perception) and assesses color distances with the precision of the human eye. The CR500 can be parameterized by means of RS232 or USB interfaces. The free software CR-Tool – CR500 facilitates the parameterization of the color sensor and the visualization of color values. A distance monitor supports the adjustment of the fiber head. Besides that, the color sensor can also be operated using the buttons. Therefore the distance monitoring can be performed by means of 12 LEDs. As all the other CROMLAVIEW® color sensors the CR500 is equipped with CROMLASTAB®-technology, which protects from temperature- and aging drifts and ensures with this method a reliable operation over the whole lifetime cycle. The sensor contains a built-in white light source clocked with a frequency of up to 2 kHz. Sampling takes place in both, the light and the dark phase. Additive ambient light cannot change the difference between the light and dark phase, so that the sensor is independent from ambient light.


The particular feature of the CR500 color sensor is the distance compensation. The color is measured from two different distances with a specially configured fiber head. The distance to the object to be measured in real time can be determined from the resulting ratio of the color signals. Numerical correction of the distance enables the color sensor to operate largely independent of the distance.


  • Distance compensated color recognition CROMLADIST®
  • Up to 350 colors can be stored
  • Quick response time from 250 µs
  • 12 channels, with binary encoding up to 4096 output combinations
  • Finest color differences can be detected (ΔE < 1)
  • Long-term stability of color recognition without new teach-in by CROMLASTAB® technology
  • Standard interfaces: USB, RS232, 12 push-pull outputs (24 V/100 mA)
  • PC software CR-tool for parameter setting and visualization of color values

Technical Data

Sensing channels

  • 1 Sensing channel
  • 1 Internal stabilization channel
  • 1 Internal distance compensation channel

Drift stabilization


Distance compensation

CROMLADIST®, can be switched off

Receiving detector

Three range photo diode



Receiving signal resolution

3 x 4096 steps

Object illumination

High-power white light LED

Ambient light compensation


Standard interfaces

  • 12 Switching outputs
  • 2 Control inputs
  • RS232
  • USB


19 LEDs for outputs, status and distance monitoring


3 buttons for Teach-In

Color resolution

ΔELab < 1

Response time

≥ 250 µs


0 ms ... 65535 ms


0 % ... 250 %

Color output channels

12, up to 350 with binary endcoding

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

Case material

Aluminium, anodized

Case size

100 mm x 70 mm x 30 mm


Approx. 260 g


Dr. Gundolf Geske

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