Low-cost array sensor detects irregularly shaped objects

Reflex array photoelectric sensor provides continuous edge detection of irregularly shaped objects, pallets and multi-height objects, such as bagged product, warped boards, and packaged products.

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WL27-3 Reflex Array photoelectric sensor from Sick is designed for reliable detection of irregularly shaped objects, such as products with tapered edges (totes), bagged product, warped boards, and packaged product. Sensor also provides continuous edge detection of multi-height objects, pallets and containers with holes or gaps. Any object 12 mm or larger is detected with the reflex array’s 50 mm detection height, regardless of object properties or position within the array, including clear materials. The reflex array can oftentimes displace the traditional approach of small light grids or stacked photoelectric sensors for such applications, according to the company.

The WL27-3 provides low-cost area detection in a standard sensor platform. Operating in a “reflex” (retro-reflective) mode results in only having to mount and power a single device. The alignment/teach procedure quickly ensures the device is operating under ideal conditions with the reflector. A high resolution version offers a minimum detectable object (MDO) resolution down to 5 mm with 24 mm detection height. www.sickusa.com

Sick WL27-3 specifications

- Short photoelectric sensors suppress backgrounds, have IP69K rating

- Edited by Renee R. Bassett for Control Engineering, www.controleng.com