Mitutoyo Edge Detection for QM-Data Display This Edge Detection unit is a great add-on to a Mitutoyo Optical Comparator system using a QM-Data Display. Whether you have a PH-A14 or a PH-3515F, as long as you have a QM-Data Display with your Mitutoyo Optical Comparator, this Edge Detection unit will help you make more accurate, more consistent readings with your optical comparator. This unit recognizes when you move the part from light to dark, or dark to light, and can automatically take points when calculating dimensions. This makes for much quicker measurements, as well as more repeatable measurements be eliminating the "human" judgement from the readings. Included in this package... Fiber Optic Cable Plexiglass Screen Holding Unit Optoeye 200 Processor Cable to connect to QM-Data