The Seastar LD-200 is a single-channel, dual-output inductive loop vehicle detector engineered for reliable vehicle presence detection in traffic management and access control systems. The unit delivers consistent performance through switch-selectable sensitivity and frequency adjustment, with advanced loop fault detection that identifies open loops, shorted loops, or inductance changes exceeding 25% of nominal value. Built-in presence output memory preserves vehicle CALL status through power interruptions up to 4 seconds, while boosted sensitivity throughout the output period prevents dropouts during high-profile vehicle passage.
Technical Specifications
• Model: LD-200
• Configuration: Single Channel / Dual Output Inductive Loop Vehicle Detector
• Sensitivity: Switch selectable
• Frequency: Switch selectable (adjustable to prevent cross-talk between adjacent loops)
• Extend Time: Selectable; extends outputs for 2 seconds when enabled
• Presence Output Hold Time: 5 minutes to 3 hours (switchable, CALL Output A)
• Loop Fault Detection: Open loops, shorted loops, inductance changes >25% nominal
• Loop Fault Memory: Non-volatile storage retained after power loss
• Output CALL Memory: 4-second power loss tolerance
• Loop Wire: Insulated copper minimum 1.5 mm² cross-section
• Feeder Cable: Twisted minimum 20 turns per meter; screened cable acceptable for noise-prone installations
– Key Features
• Dual-output architecture with independent mode operation (Presence, Duplicate, or Fault modes)
• Visual fault indication through Power and Output LED sequences
• Automatic retuning to new inductance after 2-second stabilization period
• Manual reset via front panel button or power cycle
• Power indicator confirms loop inductance within specification range
• Fault condition self-healing with memory retention
– Typical Applications
• Traffic signal detection and coordination
• Vehicle access control
• Parking occupancy monitoring
• Road tolling systems
– Compatibility & Integration
• Waterproof external housing recommended; install detector as close to loop as possible
• Output A and Output B support presence-mode operation with selectable duplicate output configuration
• Output B activates during active loop fault conditions for diagnostic monitoring
