The JUTAI High-Performance Vehicle Loop Detector is engineered to deliver unmatched speed and reliability in vehicle detection, designed for demanding environments such as toll lanes, industrial gates, and urban intersections. Featuring a rapid response time of ≤15ms, it ensures instantaneous triggering of barriers or traffic signals, eliminating delays in high-traffic scenarios. With 16-level sensitivity adjustment (0-F), the detector precisely identifies vehicles ranging from motorcycles to heavy trucks (20–2000μH inductance range), while its adaptive frequency adjustment (40–80KHz) blocks interference from adjacent detectors, EV chargers, or power lines. The IP67-rated aluminum housing provides robust protection against dust, water ingress, and extreme temperatures (-40°C to +70°C), ensuring reliable operation in harsh outdoor or industrial settings.
Ideal for smart city infrastructure and logistics hubs, this detector excels in diverse applications. In highway toll systems, its fast response prevents revenue loss from undetected vehicles, while warehouse door control benefits from its immunity to electromagnetic noise generated by forklifts or automated guided vehicles (AGVs). The universal 12-24V DC/100-240V AC input supports solar-powered and grid-connected installations, and the SPDT relay output (0.5A @ 120VAC) ensures seamless integration with traffic controllers, barriers, and IoT platforms. A recent deployment at a Middle Eastern port reduced gate congestion by 25% through precise truck detection and rapid gate cycling. Certified for CE and FCC, it also complies with RoHS environmental standards, making it a sustainable choice for modern infrastructure.
JUTAI’s detector stands out with plug-and-play installation and DIN-rail mounting, cutting setup time to under 20 minutes. The auto-reset function recovers automatically from power surges or transient faults, minimizing downtime. For parking management, its adjustable sensitivity eliminates false triggers from shopping carts or debris, and the 5-year warranty underscores its durability. Trusted globally in airports, smart cities, and industrial parks, the JUTAI High-Performance Detector redefines efficiency—where speed, precision, and ruggedness converge.
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



(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 -
Sensitivity of the loop can be adjusted by the trimpot labeled “Sensitivity”. User can select 16 different setting by turning the trimpot with 0 being the least sensitive and “F” being the most sensitive.

(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: - Install the detector in a weatherproof housing.
- The detector should be as close to the sensing loop as possible.
- The detector should always be installed away from strong magnetic fields.
- Avoid running high voltage wires near the loop detectors.
- Do not install the detector on vibrating objects.
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When the control box is installed within 10 metres of the loop, normal wires can be used to connect the control box to the loop. More than 10 metres requires the use of a 2 core shielded cable. Do not exceed 30 metres distance between control box and loop.

Loop Installation:
The loops are sealed using a “quick-set” black epoxy compound or hot bitumen mastic to blend with the roadway surface.

Trouble Shooting:

Certification

Product Series
LD-100 | LD-102 | LD-200 | LD-202 | JTHT-11 |
 Single Channel 100-240 V AC |  Single Channel 12-24 V AC/DC |  Dual Channel 100-240 V AC |  Dual Channel 12-24 V AV/DC |  Loop cable 305 m Teflon coil |
LCR-MT | | | | |
 Multimeter | | | | |