DRD-4, (Part Number 21425-21)
- Provides Derailment Detection inside and outside Rail Gauge.
- Can be used on wooden and concrete ties.
- All electrical connections are sealed against weather.
- Built-in test circuit to facilitate monthly testing.
- Durable housing designed for continuous outdoor use.
- 4 piece design accommodates a wide variety of rail mounting hardware.
- Compatible with all wayside defect detection electronic systems.
- One-Time use design.
- Wood Tie Mounting Clips sold separately under Part Number 21425-24.
- Patent Pending.
- Page updated February 2022.
