Dual Channel Loop Detector | Direction Detection & High Sensitivity & Automatic Sensitivity Boost (ASB)

The JUTAI Dual Channel Loop Detector (Models LD-200/LD-202) sets a new standard for advanced traffic and access control by seamlessly integrating direction detection, ultra-high sensitivity, and self-optimizing performance. Designed to excel in complex environments, its dual-channel architecture independently analyzes vehicle movement direction (entrance/exit) with <1-second latency, enabling precise traffic flow management at intersections, toll gates, and secure facilities. The detector’s 16-level sensitivity adjustment (0-F) ensures accurate detection across a 20–2000μH inductance range, capturing everything from motorcycles to heavy-duty trucks. The Automatic Sensitivity Boost (ASB) technology dynamically recalibrates detection thresholds in real-time to counteract environmental factors like temperature fluctuations or electromagnetic interference (EMI), maintaining >99% accuracy even in challenging conditions. Encased in a rugged IP67-rated aluminum housing, it operates reliably in temperatures from -40°C to +70°C, making it ideal for outdoor installations in smart cities, industrial zones, or coastal ports.

In smart parking systems, the LD-202’s direction detection prevents unauthorized vehicle entry by distinguishing inbound and outbound traffic, while ASB ensures consistent performance despite seasonal temperature swings or nearby EV charging stations. For highway toll lanes, dual-channel redundancy allows Channel 1 to trigger toll collection while Channel 2 verifies vehicle clearance, reducing revenue leakage by 30%. The 40–80KHz frequency range blocks cross-talk from adjacent detectors, ensuring interference-free operation in multi-lane setups. A recent deployment at a Middle Eastern logistics hub achieved a 40% reduction in gate congestion through real-time direction-based traffic routing. With universal 12-24V DC/100-240V AC input, the detector supports solar-powered and grid-connected systems, while Modbus RTU/TCP outputs enable seamless integration with centralized traffic management platforms for data-driven decision-making.

JUTAI prioritizes ease of use and compliance: plug-and-play DIN-rail mounting reduces installation time to 15 minutes, and auto-reset functionality recovers from transient power issues without manual intervention. Certified for CE, FCC, and RoHS, it adheres to global safety and environmental standards. Backed by a 5-year warranty and dedicated technical support, the JUTAI Dual Channel Detector is the definitive choice for engineers seeking precision, adaptability, and industrial-grade durability—where innovation meets real-world reliability.

Feature

• 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. Diagnostic Capabilities & LED Indication
  • Comprehensive diagnostics capabilities enable accurate diagnosis of loop and installation problems and shows through the LED state, 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. 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.

• 6. 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.

• 7. 17 Dip Switch Setting
  • 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.

• 8. Dual Channels work Cooperatively or Independently
  • Dual channel loop detector can be used as two single channel versions, Supports two independent detection channels.
  • Also allowing for the simultaneous monitoring of multiple loops, loop detector has the ability to recognize direction in single-channel applications. enhancing the flexibility and accuracy of vehicle detection.

• 9. 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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Connections

 

 

 

Modes Of Operation

The LD-200 series detector may be configured for any one of the following modes:

Presence Mode	Pulse Mode
AB Logic Presence Mode(Barrier Operation)	AB Logic Pulse Mode(Counting Logic)

 

Indicates And Switch

❀Power Led: RED Power LED Indicates “Power ON”

• CH1 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.

• CH2 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.

 

❀Sensitivity Selection

• Sensitivity and frequency of the loop can be adjusted by 7-way dip switch and 10-way dip switch setting.

• User can select 8 different setting by changing the setting of the dip-switch to different modes as in the dip-switch setting tables below. Dip switch 6, 7 and 8 for CH1 sensitivity selection with 0.8 being the least sensitive and 0.015 being the most sensitive.

• Dip switch 3, 4 and 5 for CH2 sensitivity selection with 0.8 being the least sensitive and 0.015 being the most sensitive.

 

 

 

❀Switch1=S1:Channel 1 Loop Function Selection (10 Way Dip Switch)

• (Switch 1)DIP1 & DIP2 Special Sensitivity Increase For Both Trailer (Both Channels)

 

 

 

                                               

 

• (Switch1=S1)D3,D4,D5 and(Switch2=S2)D1,D2 Setting Special Functions(Mode1,2,3 Direction Detection. Mode4,5,6 Normal mode, two loop detection are separated.)

 

 

 

• (Switch1=S1)D6 & D7 & D8 and (Switch2=S2)D3 & D4 & D5 Setting CH1 and CH2 Sensitivity Selection. (Eight Levels Choices)

 

 

 

• (Switch1=S1)D9 & D10 and (Switch2=S2)D6,D7 Setting Frequency (20 K to 100 KHz).

Reset Button: Please note: The LD-200 must be reset every time a setting change is made to the Dip switches.

 

 

 

Loop Installation

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

 

When installation, please keep the product plug and socket in the vertical direction

 

 

 

Trouble Shooting

 

 

                                                                 

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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

 

 

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