332-161 Mitutoyo Edge Detection for QM-Data DisplayMitutoyo 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