Contrast sensors detect differences between two colors by measuring the amount of light reflected by the target . In most situations the change in contrast corresponds to the difference between target and background colors Specification: Type: Other is customized: No Model Number: KT5W-2P1116 Material: Aluminum-copper Alloy Usage: Commercial Manufacture TYPE: SICK sensor Detection distance: 10mm Light source: LED Light spot size: 1.2 mm x 4.2 mm Package includes: 1 x SICK KT5W-2P1116 Contrast Sensor