Edge detector is a device combined of optics and electronics. It can detect the edges of the images projected on the screen through the optical sensors. The detector can eliminate the human error in the visual location; ensure high speed, accurate and consistent measurement. it is a advantage to measure circle, line and angle when combined with the DRO processing device (DC3000) Features: 1. Easy structure, easy to install, easy to use 2. Accuracy can reach ¡� 1.5¦�m, can beat Mitutoyo 3. Suitable for all our profile projectors Specifications and technical parameter 1) for the projection lens :10-100x 2) Repeatability: ¡� 1.5¦�m 3) The response speed: 500 mm / s 4) The minimum width of the image: 2mm on the projection screen 5) For light intensity range: on the projection screen 30Lux-1500Lux; light / dark lighting differences: on the projection screen, it is 30Lux; 6) Under 100X objective lens, if the user uses the filters, he needs the special order. Under 5X objective lens, if the brightness can not be adjusted, the user also needs the special order. Notice: 1. projector screen should be bright, uniform, no dark spots, no black spots; the work piece can not have too many glitches; clean profile; clean table 2. The probe should be kept clean, no pollution and congestion 3. The projector light source: the intensity should be stable during the edges detection; if the brightness or the focal length changes, user is required to re-calibrate the edge detector 4. During the detection, when the probe across Light and Dark boundary, the speed can not be too slow or too fast, also can not stay at the borders to avoid the detection uncertainty