A new contrast sensor that combines product usability with high performance has been added to the Leuze sensing solution product line-up. Ideally suited to packaging processes, the innovative sensor will provide reliable detection in foil bag packaging machines as well as for label detection in filling systems.

Available from Countapulse Controls, the new Leuze KRT 18B contrast sensor is a flexible multi-colour device which uses the three LED colours of red, green and blue to automatically determine the colour that produces the maximum contrast with the detected mark.

A significant feature is that reliable detection is possible even on glossy surfaces or when marks are faded. This is due to the automatic sensitivity readjustment.  Equipped with a high switching frequency of up to 22 kHz, shortened response times are possible when using the Leuze KRT 18B. An alignment aid on the 13 mm focal point means the sensor can be easily aligned and rapidly put into operation.

Different models of the sensor are available for simple switching point adjustment and each incorporates a self-adjusting bar graph for optimal display of the signal quality. One variant of the Leuze KRT 18B has two teach buttons for calibration on background and mark, while another has a potentiometer and a colour selection button.

These features make reliable functionality possible with just a single setting, even where there is a high contrast on the mark. Changes to the foil format on packaging machines, for example, can be quickly and easily adapted using the integral IO-Link interface of the sensor.

The device is housed in an ECOLAB tested housing that is rated to IP 67 and IP 69.

Countapulse Controls, the official Leuze distributor for southern Africa, is able to assess any sensing application and provide a fit-for-purpose solution that will meet the specific needs of an operation. The company also offers a 24/7 hotline to assist end users with technical challenges that may be experienced due to lack of knowledge or experience.