Universal thru-beam sensor, large housing design, 30 m detection range, red light, 30 kHz transmission frequency, light/dark on, DC version, 2 PNP outputs, test input, pre-fault output, fixed cable, Ultra bright LEDs for power on, weak signal indication and switching state, Highly visible LED as alignment aid in receiver optics, Emitter deactivation, Various transmitter frequencies, Not sensitive to ambient light, even with switched energy saving lamps