Circuitron A 5501 BD-1 Optical Detector - With 4 Opto-Sensors March 21_24_DON B last but not least

last but not least

Thanks to its compact shape and versatile uses

Ramps Easily Mastered

Model: The locomotive has a digital decoder and extensive light and sound functions

set ready to ride on their custom choppers

Circuitron A 5501 BD-1 Optical Detector - With 4 Opto-Sensors March 21_24_DON B last but not leastTiny Opto Sensors detect train movement. Sensors mount between the rails and activate circuitry when shaded from a passing train. Independent of track power, rolling stock requires no modifications. Sensors fit between ties and may be ballasted over in most cases. Circuitry is extremely sensitive and will operate properly under very low levels of room light. Positive indication whenever a section of a layout is occupied by rolling stock. Contains all