The JUTAI Dual Channel Vehicle Detector (Models LD200/LD202) is a professional-grade solution tailored for bidirectional traffic flow monitoring and accurate vehicle counting. It features two independent detection channels, supporting both directional judgment and separate single-channel use, making it ideal for roads, parking lots, toll plazas, and logistics centers needing to track two-way traffic.
- Bidirectional Direction Detection: 3 configurable modes to identify vehicle travel direction (e.g., CH1→CH2 or CH2→CH1), enabling precise two-way flow monitoring.
- Dual Channel Flexibility: Works as a unified directional system or two independent detectors—suitable for separate lane monitoring without extra hardware.
- Accurate Counting: Avoids missed or duplicate counts with 8-level adjustable sensitivity (0.015%–0.8% DL/L) per channel and anti-interference frequency settings (20–100 kHz).
- Trailer & Large Vehicle Adaptation: DIP switch-enabled sensitivity boost prevents false relay disconnection when trailers or heavy-duty vehicles exit.
- Dual Power Options: LD200 (100–240V AC) for permanent installations; LD202 (12–24V DC) for mobile/temporary traffic studies.
- Intuitive Status Alerts: LED indicators show power, detection status, and faults (short/open circuit or loop turn issues) for quick troubleshooting.
- Easy Configuration: DIP switches set operating modes, sensitivity, and frequency—manual reset button confirms changes instantly.
- Road traffic monitoring: Bidirectional flow counting and data collection for municipal planning.
- Parking entry/exit: Two-way traffic management and occupancy tracking.
- Toll plazas: Directional vehicle detection for toll collection and lane management.
- Logistics centers: Ingress/egress flow monitoring for trucks and forklifts.
- Bus lanes: Bidirectional traffic enforcement and unauthorized vehicle detection.
- Construction zones: Temporary two-way traffic flow monitoring (with LD202 DC model).
Connections
Indicators and Switches:
- Power LED (RED): Illuminates to indicate "Power ON."
- CH1 Detection LED:
- Steady On: Indicates vehicle detection.
- Slow Blinking: Indicates a loop short circuit or insufficient twists after the loop.
- Fast Blinking: Indicates a loop open circuit or excessive twists after the loop.
- CH2 Detection LED:
- Steady On: Indicates vehicle detection.
- Slow Blinking: Indicates a loop short circuit or insufficient twists after the loop.
- Fast Blinking: Indicates a loop open circuit or excessive twists after the loop.
Sensitivity Selection:
- Sensitivity and frequency adjustment is facilitated through a 7-way dip switch and 10-way dip switch settings.
- Users can choose from 8 different sensitivity settings by configuring the dip switch positions according to the provided tables.
- Dip switches 6, 7, and 8 govern CH1 sensitivity, ranging from 0.8 (least sensitive) to 0.015 (most sensitive).
- Dip switches 3, 4, and 5 control CH2 sensitivity, ranging from 0.8 (least sensitive) to 0.015 (most sensitive).
3. Switch 1=S1 : Channel 1 Loop Function Selection (10 way dip switch)
(1)(Switch 1) DIP 1 & DIP 2 Special Sensitivity Increase For Both Trailer (Both Channels).
(2)(Switch 1=S1) D3, D4, D5 and (Switch 2=S2) D1, D2 Setting Special Functions (Mode1, 2, 3 Direction Detection. Mode 4, 5, 6 Normal mode, two loop detection are separated)
(3)(Switch 1=S1) D6 & D7 & D8 and (Switch 2=S2) D3 & D4 & D5 Setting CH1 and CH2 Sensitivity Selection (Eight Levels Choices).
(4)(Switch 1=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. Installation Precautions and Troubleshooting:
- Coil Cutting Size and Embedding Guidelines are as shown in the diagram on the right.
- It is recommended to use ferromagnetic wires for the induction coil, with a total length of up to 500 meters.
- The cutting size of the coil should be a rectangle with a length of 1.0 to 2.0 meters and a width of 0.8 to 1.2 meters, avoiding right angles at corners as much as possible.
- Recommended installation overview of basic typical coil turns:
When installation, please keep the product plug and socket in the vertical direction
Application
The JUTAI LD200/202 double-channel vehicle loop detector series, equipped with direction recognition function, is ideal for numerous single-channel entry and exit scenarios. When integrated with the JUTAI One door controller (Model: AC-11), JUTAI gate barrier (Model: BR-110), and JUTAI long-range RFID reader (Model: PUHF-9), along with high-temperature resistance loop coils (Model: JTHT-11), it forms a seamless solution for single-channel entry/exit access control systems.
The working principle is as follows:
-
Entry Process:
- When a car enters the community or parking lot, the two loop coils are pressed simultaneously.
- The JUTAI Double Channel Loop Detector (LD-200/202) triggers the UHF reader located at the entrance.
- The UHF reader reads the card ID and sends it to the controller (AC-11) via Wiegand output.
- The controller verifies the ID's validity and outputs a relay signal to open the gate barrier.
- The car enters the community or parking lot, and as it passes the barrier gate, the barrier arm lowers automatically.
- The JUTAI Single Channel Loop Detector (LD-100/102) ensures safety and anti-smashing functionality during this process.
-
Exit Process:
- When a car exits the community or parking lot, it passes by an inside UHF reader.
- The LD-200/LD-202 triggers the UHF reader, which reads the card and sends the ID to the controller.
- The controller verifies the ID's validity and outputs a relay signal to open the gate barrier for the car to exit.
- As the car passes through the barrier gate, the barrier arm lowers automatically.
- The LD-100/102 provides safety and anti-smashing functionality during this process.
-
Direction Recognition:
- The Direction Recognition Function of LD-200/LD-202 ensures that the double channels loop detector does not trigger the signal again when the car passes another UHF reader, thereby recording only the entry or exit records in the system.
The JUTAI LD-200/202 Double Channel Loop Detector can also function as two independent single-channel loop detectors. This configuration is suitable for standard one-in and one-out parking lots, where there is one barrier and one long-range reader at both the entrance and exit.
In this setup, one loop coil is used to trigger the reader and read the card, while the other loop coil is dedicated to the barrier's anti-smashing function. By utilizing the LD-200/202 as two independent loop detectors, there is a potential cost-saving benefit from an economic standpoint. This setup reduces some of the hardware costs associated with using separate detectors for each function.
This functionality is achieved by enabling the Independent Working Mode feature of the LD-200/202, allowing it to operate effectively in this dual capacity.
