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24GHz Doppler Radar Sensor Traffic CW Speed Measurement

LDTR04plusm is a radar module integrating a microstrip antenna, RF circuit and signal processing circuit, which directly outputs the speed information of the target.

1. Long-Range Vehicle Detection
Detects large vehicles beyond 150m and small vehicles beyond 100m, ideal for highway and roadside speed monitoring applications.

2. High-Precision Speed Measurement
Achieves ±1 km/h accuracy across a wide speed range of 1 to 240 km/h.

3. Fully Configurable Performance
Sensitivity, direction filtering (approaching/receding), speed units, and output rate are all adjustable via serial commands.

4. Flexible Communication Interfaces
Supports both RS485 and UART (3.3V TTL) with simple ASCII output for easy integration into existing systems.

5. Compact and Reliable
Measures only 70 × 89 × 6.7 mm with robust frequency stability, suitable for roadside and outdoor installation.

Main parameters

Part number TR04PLUSM
Frequency range 24-24.25GHz
Modulation mode CW
Large vehicles 150 m
Small vehicles 100m
Interface RS485 (3.3VTTL level signal)
Baud rate 9600bps
Speed measurement rang 1Km/h-250Km/h
Speed measurement error less than ±1Km/h
Voltage 9-24V
Current 55mA@12V(Infineon solution)
Output Power(EIRP) 20dBm
Antenna Angle 26°x 13°
Radar size 106*106*24 mm

Request Free Quote for 24GHz Millimeter Wave Radar Traffic Speed Radar Sensor

Application

It can be used for long-distance car speed measurement over 150 meters. It adopts an integrated RF chip, with extremely high frequency stability and a speed measurement accuracy of up to 1KM/h.

It is widely used for vehicle speed monitoring and early-warning systems on highways, urban trunk roads, county roads, rural roads, and in curves and intersections where safety visibility is limited.

What is the maximum detection range for vehicles?
Large vehicles >150m, small vehicles >100m.
What is the speed measurement accuracy?
±1 km/h when the target direction is aligned with the radar beam axis.
Can it detect stationary targets?
No. This radar only detects moving targets. Stationary objects are ignored.
What communication interfaces are available?
RS485 and UART (3.3V TTL) with 9600bps baud rate.
Can I adjust the sensitivity?
Yes. Sensitivity is configurable via serial command (0x00–0x70). Lower values increase range but reduce interference rejection.
Can I filter by direction (approaching/receding)?
Yes. You can configure the radar to detect only approaching targets, only receding targets, or both.
What is the beam angle?
Horizontal: 13° (±6.5°), Vertical: 26° (±13°).
Does the module include a radome (antenna cover)?
No. Customers must use wave-transparent materials like PBT or PLA, with a minimum distance of 6.22mm from the antenna surface.
What are the different chip versions?
Two RF chip solutions are used: Infineon (current ~55mA) and Rayjet (current ~90mA). Shipment is random without special notice.

Technical Support & Custom Solution

We provide datasheet, dimension drawing, interface protocol, demo code and technical support.

Support sample test, ODM/OEM customized service, welcome global customers to inquire and cooperate.

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