Color Mark Sensor, NPN Output, 10±2mm/9mm

A color mark sensor is a high-precision device used to detect specific color marks or object surface colors. It scans the surface of the object being detected by emitting a light source. Depending on the color of the surface, the amount of light reflected back varies, enabling the identification of color marks. It is widely used in the fields of automated control and quality inspection.

Color mark sensors utilize optoelectronic technology to identify color marks on objects by comparing different colors or color differences. A common method involves using red, green, and blue light sources to illuminate the target, with the sensor receiving and analyzing the reflected light intensity. When a color or contrast difference deviating from the set reference is detected, the sensor outputs a switch signal, which is used for positioning and detection in industries such as packaging, printing, and labeling.

Color mark sensors are widely used on transparent, semi-transparent, and opaque materials, including plastic films, paper, metal foils, and fabrics. They can not only identify vivid printed color marks but also detect subtle contrast differences, making them suitable for label positioning and cutting control on high-speed production lines. Different sensor models can adapt to varying reflectivity levels and material backgrounds to ensure detection accuracy.