Circuitron BD-2HD Current Sensing Detection Unit

BD-2HD Current Sensing Detection Unit Detects current drawn by a locomotive or lighted piece of rolling stock. Unpowered equipment can be detected by using metal wheelsets with resistors connected across the insulator. Works in any scale and with most track power, systems including most forms of carrier control. Bi-directional - For all Scale Red & Green Outputs wiil drive LEDs or Lamps 10-18 volt AC or DC input