800-5203 DT-3 Grade Crossing Detector Single Direction Brand_Hornby small pebbles) and coarse (blast

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In 1954 the pressure discharge bulk powder wagon

800-5203 DT-3 Grade Crossing Detector Single Direction Brand_Hornby small pebbles) and coarse (blastDT 3 Grade Crossing Detector Single Direction Details: The Circuitron DT 3 Single Direction Grade Crossing Detection Circuit is a versatile optical train detection system designed to provide reliable and realistic grade crossing operation on virtually any model railway. Using Circuitron's proven opto electronic detection technology, the DT 3 accurately detects approaching trains without requiring any modifications to locomotives, coaches or freight