EdgeMaster photoelectric sensors from Balluff Inc., Florence, KY, are for the detection and monitoring of web edges or object edges. The sensors are supplied in four types. The BAV MA series has a fixed dual optical axis edge detection design and provides 2 independent discrete outputs to show edge position changes. The BGL C photo array sensor gives a proportional analog or dual discrete outputs based on the amount of light blocked by the edge of the material inside the sensor's viewing area. The BOL 27 projects a 150 mm line of light over an edge and against a reflective tape to provide an analog and discrete output for accurate position feedback. The BGL 21 is for contrast mark or label detection in high-speed web-based applications.
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