Accurate Traffic Signal Loop Detector High Sensitivity Easy Integration Relay Output Presence Relay

The Traffic Signal Loop Detector is engineered to optimize urban mobility with pinpoint accuracy and seamless adaptability for modern traffic management systems. Featuring 16-level ultra-high sensitivity (0-F), it precisely detects vehicles ranging from motorcycles to articulated buses (15–2000μH inductance range), even in high-speed, high-density traffic scenarios. Its adaptive frequency hopping (20–80KHz) eliminates interference from nearby industrial equipment, 5G networks, or adjacent detectors, ensuring 99.9% detection accuracy in complex intersections. Built for reliability, the detector operates flawlessly in extreme temperatures (-30°C to +80°C) and humidity, with an IP66-rated aluminum housing that resists road salt, dust, and heavy rain—making it ideal for roundabouts, highway on-ramps, and urban corridors. Real-time LED diagnostics and auto-reset functionality provide instant alerts for coil faults or power anomalies, minimizing downtime in mission-critical traffic zones.

Designed for effortless integration into existing infrastructure, this detector supports NEMA TS2 and EN 12675 compliance, ensuring compatibility with global traffic signal controllers. Its plug-and-play wiring and DIN-rail mounting simplify installation, while Modbus RTU/TCP protocols enable seamless data exchange with centralized traffic management systems (TMS) for adaptive signal timing and congestion analytics. In smart city deployments, the detector feeds real-time vehicle counts and speed data to cloud platforms, empowering AI-driven traffic flow optimization and emergency vehicle prioritization. For example, a pilot project in Los Angeles reduced intersection delays by 22% during peak hours through dynamic signal adjustments. Certified for CE, FCC, and RoHS, and backed by a 10-year lifespan, this detector is the cornerstone of efficient, future-ready traffic networks—where precision meets resilience.

Features

• 1. 15-2000 μh detection Range
  • The loop detector supports a wide detection range from 15 µH to 2000 µH, accommodating various loop sizes and configurations for versatile application in different traffic detection scenarios. The wide detection range enables our loop detector to detect all kinds of vehicles, motorcycles, cars, Ultra long truck, buses and so on.

• 2. Compact Side
  • The compact and well-engineered housing combines all industry requirements for features and functionality, allowing this detector to be incorporated into any existing traffic detection system.

• 3. LED Diagnostic Capabilities
  • Comprehensive diagnostics capabilities enable accurate diagnosis of loop and installation problems and shows through LED, ensuring optimal performance and reducing downtime.

• 4. Selectable Presence Time
  • The output of the presence relay can be selected to limit a detect output to a fixed time (greater than 30 minutes) while a vehicle remains on the loop, providing flexibility in traffic management.

• 5. Loop Presence Time
  • Interference between adjacent loop detectors can be identified through integral indication and eliminated by adjusting the frequency setting, ensuring reliable operation.

• 6. Two Separate Output Relays
  • Presence Relay A: Provides presence output and can be extended for 0, 2, 5, 8, 10, 15, 20, or 30 seconds, programmable with external 10-way DIP switches.
  • Pulse Relay B: Programmable with external 10-way DIP switches, it offers presence, pulse on entry, pulse on exit, or failed output, enhancing detection flexibility.

• 7. Automatic Sensitivity Boost (ASB)
  • This feature reliably detects large truck-trailer combinations and high-bed vehicles by automatically boosting the sensitivity to maximum upon vehicle detection, ensuring accurate identification.

• 8. Automatic Environment Drifting Compensation
  • Loop detectors (or other sensors) automatically adjust and calibrate themselves to changes in environmental conditions, maintaining detection accuracy and stability despite varying weather and environmental factors.

• 9. 10 Dip Switch
  • The dip swich design on the shell makes the setting of loop detector easier and clearer, which is very user-friendly for users. Users can set all the functions first and then install the loop detector.

• 10. Anti-crosstalk interference.
  • Through the dip Switch, the frequency of the loop detector can be adjusted to prevent crosstalk interference caused by the installation of two loop coils too close.

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