Circuitron 800-5521 BD-1HD Optical Detector

The Circuitron BD-1 is an advanced, integrated circuit design Block Occupancy Detector utilizing our proven Opto-Electronic design which provides positive indication when- ever a block-section of a layout is occupied by any piece of rolling stock.

The BD-1HD is identical to the BD-1 but includes heavy duty output transistors to power lamps in large scale signals. Each output on the BD-1HD can control 500 ma.