Digitrax BD4 Occupancy Detector for 4 Detection Sections

When used in conjunction with the DS64 or SE8C the BD4 provides LocoNet detection for 4 occupancy detection sections. 
 
BD4 lets you know which detection sections of your layout are occupied by locos and rolling stock.
 
Cost Effective occupancy detection for 4 detection sections
Outputs for panel mounted LEDs to display occupancy
Detects any powered locomotive
Detects un-powered rolling stock equipped with resistor wheel sets
Transmits occupancy information to your LocoNet System using DS64 or SE8C (sold separately).