Detects vehicle speeds from more than 180 meters away and sends speed data to traffic systems for road monitoring, speed alerts, and traffic management.
Rajguru Electronics (I) Private Limited has introduced the HLK-LD2415H, a millimeter-wave radar module designed for vehicle speed measurement and traffic monitoring applications. Operating in the 24.125 GHz K-band, the module can detect and measure vehicle speeds at distances of 180 meters or more, making it suitable for roadside speed warning systems, traffic monitoring installations, and intersection safety applications.
The HLK-LD2415H integrates a microstrip antenna, RF circuitry, and signal processing functions into a compact module measuring 69 mm × 53 mm × 5 mm. According to the company, the radar supports speed measurements from 1 km/h to 240 km/h with an accuracy of within ±1 km/h when the vehicle movement direction aligns with the radar beam axis.
The module is designed to support deployment across highways, urban roads, county roads, intersections, and curved road sections where vehicle speed monitoring is required. It provides both RS485 and TTL serial communication interfaces, allowing integration with traffic control systems, warning displays, and data collection platforms.
The radar uses continuous-wave (CW) detection technology to monitor moving vehicles and outputs speed information directly. Users can configure parameters such as minimum detectable speed, angle compensation, sensitivity levels, target direction filtering, output frequency, and speed units. The system can also distinguish between approaching and departing vehicles, enabling application-specific traffic monitoring setups.
Operating from a 9 V to 24 V power supply, the module consumes up to 1.2 W of power and typically draws less than 50 mA at 12 V. The antenna provides a horizontal beam width of 40 degrees and a vertical beam width of 16 degrees, allowing coverage across multiple traffic lanes.
Additional features include configurable vibration-interference suppression, optocoupler-based relay triggering, and support for both standard and custom communication protocols. The radar can output speed data at configurable frame rates and can report measurements in kilometers per hour, miles per hour, or meters per second.
For installation, the company recommends mounting the radar 1 to 2 meters above ground level on either side of the road, with the antenna surface positioned at an angle of less than 10 degrees relative to the roadway for optimal performance.
