Dual Channel Vehicle Loop Detector Direction Detection For Traffic Counting LD200 LD202
Product Overview
The JUTAI Dual Channel Loop Detector models LD200 and LD202 are professional grade detection devices designed for advanced vehicle monitoring applications. Utilizing two independent inductive loops, this detector not only identifies vehicle presence but also determines the direction of travel, making it ideal for traffic counting, parking management, and access control systems where monitoring bidirectional flow is essential.
With two completely separate channels, each with its own sensitivity adjustment and relay output, the device offers unparalleled flexibility. It supports multiple operating modes configurable via DIP switches, including directional detection, presence hold, and pulse output modes to suit a wide array of industrial and commercial applications.
Key Features
- Dual independent detection channels for simultaneous monitoring
- Advanced directional detection mode identifies vehicle travel direction
- Configurable as two separate detectors or as a coordinated directional system
- Independent 8 level sensitivity adjustment for each channel
- Four selectable frequency settings to minimize cross talk
- LED indicators for power and individual channel status including fault diagnostics
- Supports 100 to 240V AC (LD200) or 12 to 24V DC (LD202) power input
- Dedicated relay output per channel for presence or pulse signals
- Manual reset button for confirming configuration changes
- Robust housing suitable for indoor and outdoor installations
Applications
- Car park entry and exit counting and occupancy management
- Drive through lane vehicle sequencing and control
- Toll station traffic flow monitoring and data collection
- Industrial site vehicle ingress and egress logging
- Warehouse and logistics center high speed door control
- Shopping center parking facility entry exit separation
- Airport perimeter road traffic monitoring
- Bus lane enforcement and unauthorized vehicle detection
- Freeway on ramp and off ramp traffic studies
- Loading dock traffic management and scheduling
- Drive in bank or restaurant queue management
- Gate automation systems requiring direction sensing
- Traffic signal coordination at intersections
- Vehicle classification and counting for municipal planning
- Parking guidance system data input
- EV charging station entry exit management
- Car wash dual lane vehicle detection
- Security checkpoint vehicle processing
- Agricultural and mining site vehicle flow analysis
- Industrial plant internal traffic monitoring and safety
Technical Specifications
| Parameter |
Specification |
| Model |
LD200 (AC) / LD202 (DC) |
| Channels |
2 Independent |
| Power Supply |
100-240V AC (LD200) / 12-24V DC (LD202) |
| Frequency Range |
20-100 kHz (4-step selectable) |
| Sensitivity per Channel |
8-level adjustable (0.015% to 0.8% DL/L) |
| Response Time |
10-90 ms (on/off) |
| Operating Temperature |
-40°C to +70°C |
| Relay Output |
2 Relays (One per channel COM and NO) |
| Indicators |
Power LED (Red) + CH1 & CH2 Detection LEDs (Green) |
| Reset Function |
Manual reset button |
| Humidity Tolerance |
Up to 95% (non-condensing) |
| Loop Inductance Range |
20-2000 µH per channel |
| Direction Detection Modes |
Multiple modes configurable via DIP switches |
DIP Switch Configuration Overview
Switch 1 DIP 1-2: Special trailer sensitivity and auto reset modes
Switch 1 DIP 3-5 and Switch 2 DIP 1-2: Select operation mode (Direction Detection or Separate Channels)
Switch 1 DIP 6-8 and Switch 2 DIP 3-5: Set sensitivity for CH1 and CH2 independently
Switch 1 DIP 9-10 and Switch 2 DIP 6-7: Set operating frequency to avoid interference
Loop Installation Guide
| Loop Perimeter Per Channel |
Recommended Turns |
| 3 to 4 m |
6 turns |
| 4 to 6 m |
5 turns |
| 6 to 10 m |
4 turns |
| 10 to 20 m |
3 turns |
| Over 20 m |
2 turns |
Why Choose JUTAI Dual Channel Loop Detector
- Over 15 years of specialized experience in vehicle detection
- Advanced directional logic for complex traffic monitoring needs
- Rigorous production testing ensuring high reliability and longevity
- OEM and ODM services available for product customization
- Competitive pricing with support for both small and large quantity orders
- Comprehensive 2 year warranty and dedicated technical support
Connections and Indicators
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).
Switch Configuration Details
Switch 1 (S1): Channel 1 Loop Function Selection (10 way dip switch)
DIP 1 & DIP 2: Special Sensitivity Increase For Both Trailer (Both Channels)
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)
D6 & D7 & D8 and (Switch 2=S2) D3 & D4 & D5: Setting CH1 and CH2 Sensitivity Selection (Eight Levels Choices)
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
When installation, please keep the product plug and socket in the vertical direction
Application Scenarios
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.
Working Principle
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.
Independent Working Mode
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.
Order Information
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