Inductive loop detectors sense metal mass (vehicles) passing over them, enabling automatic gate operation and safety functions. Understanding how they work helps with troubleshooting and proper use.
How Loop Detectors Work
- Wire loop embedded in pavement
- Loop connected to detector module
- Detector creates electromagnetic field
- Metal vehicle disrupts field
- Detector signals presence
Loop Functions
Free Exit
- Detects vehicle wanting to exit
- Opens gate automatically
- No remote needed to leave
Safety
- Prevents gate closing on vehicle
- Required safety device
- Reverses or holds gate open
Shadow Loop
- Secondary loop in gate path
- Detects vehicles in closing zone
- Additional safety measure
Installation Basics
- Loop cut into pavement
- Wire laid in groove
- Sealed with loop sealant
- Lead-in wires to detector
Loop Shapes
- Square: Standard detection
- Diamond: Better for motorcycles
- Quadrupole: Directional sensing
Common Issues
No Detection
- Broken loop wire
- Poor connection
- Detector failure
Phantom Detection
- Sensitivity too high
- Metal near loop
- Nearby interference
Troubleshooting
- Check wire continuity
- Verify connections
- Adjust sensitivity
- Test with known vehicle
Loop Installation
Standard Gate Co installs and services loop detectors. We ensure proper detection and safety. Call (323) 488-GATE.