Thru-beam sensor LA29/LK29-Z-F1/31/116-SET, Thru-beam sensor, Thru-Beam Sensors, Robust, compact photoelectric sensor for single-beam gate protection, Very high detection range, No measurable emitted interference on all frequencies, Not sensitive to ambient light, even with energy saving lamps, Adjustable timer functions, Version with accessories in scope of delivery, No spacing required between modules