The sensors can be placed farther from the target, which provides protection against mechanical damage. The sensor's threaded housing is made of 316 stainless steel with an integrated PMMA lens. The device uses a standard M12 cable assembly for electrical connection. The sensors are three-wire dc, pnp units available in dark-on or light-on modes.

ifm efector inc., 805 Springdale Dr., Exton, PA 19341 (800) 441-8246,