BERKSHIRE JUNCTION INFRARED DETECTOR AND ACTIVATOR 4 BEAM
Perfect for operating another manufacturers crossing flasher, bell sounds, signals, etc., this circuit was designed with grade crossings in mind. When the train breaks one of two (or four) infrared beams the circuit activates, turning a device on or off via the included DPDT relay. Beam length (between source and detector) can be up to 8 inches, allowing one beam to cover multiple tracks. Infrared design allows this circuit to work for night scenes or low light areas just as well as on a fully lit layout. Requires 12 Volt DC (All Gauges) 4 beam unit: Includes 4 Infrared light sources and detectors.