Sensors & Transducers


Leuze’s new contrast sensor

February 2017 Sensors & Transducers

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.

The new Leuze KRT 18B contrast sensor is a flexible multicolour device, which uses the three LED colours of red, green and blue to determine the colour that produces the maximum contrast with the detected mark.

Reliable detection is possible even on glossy surfaces, 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 IP67 and IP69.

For more information contact Gerry Bryant, Countapulse Controls, +27 (0)11 615 7556, bryant@countapulse.co.za, www.countapulse.co.za





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