LDK 520nm Green Distance Laser Sensor
Phase-Based Distance Measurement | 520nm Green Laser Wavelength
The LDK 520nm Green Distance Laser Sensor adopts the phase-based distance measurement principle, calculating the exact distance to a target by analyzing the phase shift of the modulated laser signal. Compared to traditional Time-of-Flight (ToF) methods, phase-based measurement provides higher accuracy and stability for short-range applications. Additionally, the sensor utilizes a 520nm green laser, which offers better performance than infrared or red lasers in bright environments, making it ideal for outdoor and reflective surfaces.

Technical Specifications
Measuring Range | 0.03-40/60/80m |
Frequency | 4/10/20Hz |
Accuracy | ±3-5mm |
Laser Type | 520nm, <1mW, Green laser |
Laser Class | Class II, safety laser |
Communication Interface | UART/RS232/RS485/Bluetooth |
Serial Level | VTTL=3.3V |
Operating Temperature | 0~40℃(32~104℉) |
Storage Temperature | -25~60 ℃ (-13~140 ℉) |
Power Consumption | <130mA@3.3V |
Size | 45*25*12mm |
Weight | 10g |
High-Precision Measurement
The LDK 520nm Green Laser Distance Sensor delivers high-precision measurements within a range of 0.03-80m, with an accuracy of just 2-5mm. This level of precision makes it ideal for industrial measurement, quality control, and automation inspection applications that require exceptional measurement accuracy.
Multiple Communication Interfaces

The sensor supports a variety of industrial communication interfaces, including RS232, RS485, TTL, Modbus, and CAN, allowing seamless integration into automation systems, robotic platforms, smart measurement setups, and industrial control networks for efficient data transmission and remote operation.
Support for Secondary Development
The LDK 520nm Green Distance Laser Sensor is developer-friendly, offering comprehensive documentation and demo code for seamless integration. It supports secondary development on platforms such as Arduino, Raspberry Pi, and ESP32, enabling quick customization for a wide range of smart hardware applications.
Fast Response Speed
The sensor features a fast response time with selectable measurement frequencies of 4Hz, 10Hz, and 20Hz, ensuring high-speed and stable measurements across different application scenarios.
Compatible with Various Target Materials
This sensor can measure distances to metal, non-metal, walls, fabrics, and other materials. Whether the surface is smooth or rough, it maintains high measurement accuracy, making it suitable for diverse industrial and commercial applications.
Class II Safe Laser
The LDK 520nm Green Laser Distance Sensor complies with Class II laser safety standards, ensuring that its low-power laser emission is safe for human eyes. This makes it suitable for working environments where frequent laser exposure occurs, eliminating the need for additional protective measures.
Suitable for Various Applications
With its high precision, fast response, and versatile connectivity, the LDK 520nm Green Distance Laser Sensor is widely used in the following scenarios:
- Industrial Automation: Precise object positioning, ideal for robotics and workpiece detection
- Logistics & Warehousing: Cargo dimension measurement, stacking monitoring
- Smart Transportation: Short-range distance sensing, such as parking guidance and obstacle detection
- Construction Measurement: High-precision wall and indoor structure measurements
- Scientific Research: Optical measurement and physics experiments

The LDK 520nm Green Distance Laser Sensor is the ideal solution for high-precision short-range measurement, offering superior accuracy, fast response, multiple communication interfaces, and seamless secondary development support.