Inductive Loop Vehicle Detector with 16-Level Sensitivity Adjustment for Car Park Access Control
Designed for reliable vehicle detection in car park access control systems, this inductive loop vehicle detector provides stable sensing, flexible adjustment, and practical relay control for entrances, exits, barrier gates, ticket dispensers, and license plate recognition systems. Its 16-level sensitivity adjustment allows installers to fine-tune detection performance according to loop size, installation depth, surrounding electromagnetic conditions, and the type of vehicle being detected. Lower settings can help reduce unwanted triggering in electrically noisy environments, while higher sensitivity supports smaller vehicles and motorcycles.
The detector supports a wide loop inductance range of 15–2000 μH, making it compatible with different loop dimensions, shapes, and turn configurations. It can detect motorcycles, passenger cars, vans, trucks, heavy-duty vehicles, and long trailers. Automatic Sensitivity Boost helps maintain reliable presence detection after a vehicle is first detected, which is especially useful for trucks, trailers, and vehicles with high or uneven chassis structures.
For access control integration, the relay outputs support both trigger and vehicle-presence functions. Configurable operating modes include entry pulse, exit pulse, and presence output, allowing the detector to interface with barrier controllers, LPR cameras, ticket or card dispensers, and other parking equipment. The presence function can keep a barrier open while a vehicle remains over the loop, supporting anti-crush protection and safer gate operation.
Four selectable operating frequencies help reduce interference when multiple induction loops are installed close to each other. Adjustable relay release delay settings from 0 to 30 seconds provide additional flexibility for delayed barrier closing, vehicle passage management, and equipment coordination. LED indicators assist with power status, vehicle detection, and loop fault diagnosis, while the reset function simplifies recalibration after parameter changes.
Suitable for parking facilities, residential communities, commercial buildings, industrial sites, and controlled vehicle entrances, this inductive loop vehicle detector provides a practical solution for accurate vehicle triggering, continuous presence monitoring, barrier safety control, and automated parking access operation.
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.
Connection
Indicates And Switch
(1)Power Led: RED Power LED Indicates “Power ON”
- Detecting Led: Continuously On: Indicates vehicle detection.
- Blinking slowly: Indicates loop is short circuit or the number of twists after the loop is not enough.
- Blinking fast: Indicates loop is open circuit or too many twists after the loop.
(2)Switch 1 (Trimpot), Sensitivity Selection
(3)Switch 2 (Dipswitch Settings)
1.DIP 1 & DIP 2 Setting Special Functions
2. DIP 3 & DIP 4 Setting Relay B Output
3. DIP 5 Setting Automatic Reset
4. DIP 6 & DIP 7 & DIP 8 Setting Relay A Delay
5. DIP 9 & DIP 10 Setting Frequency (40 K to 100 KHz). Used to avoid the interference
- In the application, where two or more loop detectors and sensing loops have been installed, set one detector to high frequency and the other set to low frequency to minimize the effects of cross-talk between the two systems(The sensing loops and detectors should be positioned at least 2m apart).
- Reset Button:Please note: The LD-100 must be reset every time a setting change is made to the Dip switches.
Detector Position And Installation
Loop Installation
The loops are sealed using a “quick-set” black epoxy compound or hot bitumen mastic to blend with the roadway surface.
Troubleshooting
Certification
Product Series
| LD-100 |
LD-102 |
LD-200 |
LD-202 |
JTHT-11 |
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Single Channel
100-240 V AC
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Single Channel
12-24 V AC/DC
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Dual Channel
100-240 V AC
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Dual Channel
12-24 V AV/DC
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Loop cable
305 m Teflon coil
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| LCR-MT |
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Multimeter
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