Contrast sensors spot subtle differences

DK20 and DK21 Series contrast sensors reliably detect the toughest colour contrasts.

DK20 and DK21 Series contrast sensors reliably detect the toughest colour contrasts.

Not only ideal for detecting registration marks on paper, the DK20 and DK21 contrast sensors can also be used whenever one colour must be recognised against another colour background.

Application examples include: detection of printed code on an aluminium can; label counting; presence verification of plastic liners in bottle caps; and verification of glue application.

DK20 contrast sensors allow static teach programming in which the two sensing conditions (target and background) are programmed individually.

DK21 contrast sensors allow dynamic teach programming in which the two conditions are taught in one 'on-the-fly' step.

Both DK20 and DK21 contrast sensors offer: fast 16.5kHz switching frequency; simple pushbutton programming or remote teach programming; solid-state light source for a longer operating life; automatic selection of three colour LEDs for optimum performance; interchangeable lens orientation; and different options for light spot sizes/orientations and sensing ranges.

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