Industrial 7581ATOX2NXX & 7581AR4X4NLX Photoelectric Sensor

7581ATOX2NXX and 7581AR4X4NLX are SunX ultrasonic beam switch devices from ATC SunX, part of the 7581A family. These units are used for non-contact object detection in industrial automation and are described in distributor catalogs as ultrasonic beam switches; they are discontinued by the manufacturer. The devices have a compact form and a weight of about 0.17 lb, suitable for mounting in tight spaces on equipment and conveyors. Given their discontinued status, procurement typically relies on surplus or secondary-market sources, and buyers should confirm electrical interface and compatibility with existing control systems using archived SunX documentation or supplier datasheets when considering replacement or retrofit of a legacy installation.