Circuitron, Inc.
Circuitron SD-3 Signal Detector
Mt. Penelope Railway Seal of Approval
Circuitron, Inc.
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SD-3 Signal Detector



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Drives any single target tri-color LED-type signal to red, green and amber aspects.

Amber hue fully adjustable.

May be controlled by three-position switch or automatically by detector circuits such as BD-1 (minimum of three blocks required).

  • 10-18V AC or DC
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CI-800-5530
SD-3 Signal Detector
Our Price: $23.28
MSRP: $26.95

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Add to My Railroad   Copy this SD-3 Signal Detector to your MY ACCESSORIES roster.
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