Name: High Sensitivity Vehicle Loop Detector with ASB Function for Trucks Trailers and
Brand: JUTAI

High Sensitivity Vehicle Loop Detector with ASB Function for Trucks Trailers and

MOQ： Support 1-10 Pcs for Sample

Price： 30-38

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Humidity	95% non-condensing
Warranty	2 Year
Payment Terms	L/C,D/A,D/P,T/T,Western Union,Paypal,Alipay
Working Type	-40 to +70 ℃ (-111°F to +158°F)
Sensitivity	16 way selectable/Highest 0.01% DL/L / Lowest 2.56% DL/L
Package	Carton
Supply Ability	5000 Pcs per Month
Voltage Supply	100-240 VAC 48 to 62Hz
Self-turning range	20-2000uh
Loop Connection	Twisted pair cable
Delivery Time	5-8 working day
Response Times	10-90 MS
Color	Green
Package Size	1368652 mm
Packaging Details	50 Pcs 1 Carton
Product Size	764291.5 mm
Net Weight	195 g
Name	Vehicle Loop Detector
HS Code	9033000090
Gross Weight	300 g
Relay Output	Presence Relay / Fault Relay
Model Number	LD-102
Place of Origin	Shenzhen China
Certification	CE FCC
Brand Name	JUTAI

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Humidity

95% non-condensing

Warranty

2 Year

Payment Terms

L/C,D/A,D/P,T/T,Western Union,Paypal,Alipay

Working Type

-40 to +70 ℃ (-111°F to +158°F)

Sensitivity

16 way selectable/Highest 0.01% DL/L / Lowest 2.56% DL/L

Package

Carton

Supply Ability

5000 Pcs per Month

Voltage Supply

100-240 VAC 48 to 62Hz

Self-turning range

20-2000uh

Loop Connection

Twisted pair cable

Delivery Time

5-8 working day

Response Times

10-90 MS

Color

Green

Package Size

136*86*52 mm

Packaging Details

50 Pcs 1 Carton

Product Size

76*42*91.5 mm

Net Weight

195 g

Name

Vehicle Loop Detector

HS Code

9033000090

Gross Weight

300 g

Relay Output

Presence Relay / Fault Relay

Model Number

LD-102

Place of Origin

Shenzhen China

Certification

CE FCC

Brand Name

JUTAI

High Sensitivity Vehicle Loop Detector with ASB Function for Trucks Trailers and High Chassis Vehicles

The high sensitivity vehicle loop detector is designed for reliable vehicle detection in applications involving trucks, trailers, buses, semi-trailers, and other high chassis vehicles. By working with an inductive loop installed beneath the road surface, the detector identifies changes in loop inductance caused by metal vehicle bodies and provides stable relay signals for connected control equipment. It is suitable for locations where conventional vehicle detection may become less stable because of high ground clearance, uneven chassis structures, or varying vehicle sizes.

A key feature is the Automatic Sensitivity Boost, or ASB, function. Once a vehicle is initially detected, ASB automatically increases detection sensitivity to help maintain continuous vehicle presence recognition. This is particularly useful when long trucks or trailers pass over the induction loop, as the metal distribution underneath these vehicles may vary significantly from the front to the rear. Maintaining stable detection helps reduce the risk of signal loss while the vehicle is still occupying or crossing the loop area.

The detector also provides 16 selectable sensitivity levels, allowing installers to adjust detection performance according to loop dimensions, installation depth, electromagnetic conditions, and target vehicle types. Its wide 15–2000 μH inductance range supports different loop sizes, shapes, and numbers of turns, providing flexibility for various installation environments. Four selectable operating frequencies can be configured when multiple loops are installed nearby, helping reduce electromagnetic crosstalk between adjacent detection zones.

Flexible relay functions support vehicle presence monitoring, entry pulse, and exit pulse applications. Permanent presence mode can continuously maintain the output while a vehicle remains above the loop, making it suitable for applications where trucks may stop or move slowly for extended periods. Adjustable relay release delays also support smoother coordination with barriers, gates, cameras, and other control systems.

This high sensitivity vehicle loop detector is well suited for truck entrances, logistics parks, warehouses, industrial facilities, weighbridge systems, toll lanes, parking barriers, loading areas, and access control points serving mixed vehicle types. Its adjustable sensitivity, ASB function, wide inductance compatibility, and configurable relay control provide a practical solution for dependable detection of both standard vehicles and challenging high chassis vehicles.

Vehicle loop detector

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

vehicle loop detector connection

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

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

vehicle loop deetector

2. DIP 3 & DIP 4 Setting Relay B Output

vehicle loop detector

3. DIP 5 Setting Automatic Reset

vehicle loop detector

4. DIP 6 & DIP 7 & DIP 8 Setting Relay A Delay

vehicle loop detector

5. DIP 9 & DIP 10 Setting Frequency (40 K to 100 KHz). Used to avoid the interference

vehicle loop detector

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.
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.

vehicle loop detector

Troubleshsooting:

Certification

vehicle loop detector

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

High Sensitivity Vehicle Loop Detector with ASB Function for Trucks Trailers and