Leuze electronic KRT 3B series contrast scanners

The KRT 3B series contrast scanners from Leuze electronic distinguish between greyscale values, enabling them to detect minimal contrast. As a result, a check can be performed for the presence of text or imprints or so-called marks detected. All three transmitter models - RGB light, white light and laser light - are available in a small construction. In addition to the standard design, the sensors are also available in stainless steel, in the Wash-Down and Hygiene designs.

These scanners have response times of down to 50 µs and high repeatability, and the use of IO-link makes on-site configuration possible with simplicity and reproducibility. With the three teach processes - 2-point teach, static 1-point teach and dynamic 2-point teach - the optimum teach process is available for every type of machine use.

The switching thresholds ascertained via teach-in can be changed during running operation in 4% increments with EasyTune. By means of this online switching-threshold correction, it is possible to quickly respond to changed process parameters without performing a new teach-in.

These scanners also feature YellowBoost, a form of yellow support developed by Leuze with which contrast detection of the white-light contrast scanner is optimised. Although this affects all wavelengths, smoothing of the signal deviation is strongest in the yellow-light range, hence the name of the function.