LS Lidar LS74A Long Range 1500m Laser Distance Sensor

The LS LiDAR LS74A is a compact single-point laser distance sensor designed for long-range distance measurement. It uses Time of Flight technology to measure the distance between the sensor and a target at a fixed angle and provides real-time ranging data for integration into surveying, mapping, monitoring and automated measurement systems.

The LS74A is a single-point distance sensor rather than a 2D or 3D scanning LiDAR. It measures distance along a fixed laser direction and does not independently sweep its beam across an area. Applications requiring a complete 2D or 3D point cloud therefore need additional positioning or scanning hardware.

The LS74A is designed for applications requiring long-range non-contact distance measurement. Manufacturer documentation lists applications including building surveying, topographic mapping, environmental detection and monitoring, as well as specialised industrial and defence-related systems.

The LS74A uses Time of Flight, or TOF, technology. It transmits a modulated laser pulse toward a target and measures the time required for the reflected light to return to the sensor. Because the speed of light is known, the sensor can use this travel time to calculate the distance to the target.

Not by itself. The LS74A measures one distance along its fixed measurement direction. A complete point cloud would require the LS74A to be combined with an external scanning, positioning or motion system that records the direction and position associated with multiple distance measurements.

Yes. Its compact dimensions, low weight, low power consumption and TTL serial communication interface make the LS74A suitable for integration into custom measurement systems, monitoring equipment, robotics, positioning platforms and other OEM applications that require long-range distance data.

The LS74A has a specified ranging distance of approximately 10 to 1200 metres when measuring a target with approximately 30% reflectivity. Actual achievable range depends on factors including target reflectivity, atmospheric conditions, installation, target angle and environmental light.

The manufacturer's specification lists a ranging distance starting at approximately 10 metres. The LS74A is therefore primarily intended for medium- and long-range applications rather than short-range proximity sensing.

The LS74A has a specified ranging accuracy of ±1 metre at 1 sigma. It is intended for applications where long-range detection and distance measurement are more important than millimetre- or centimetre-level surveying accuracy.

No. The specified LS74A ranging accuracy is ±1 metre, so it should not be confused with a survey-grade total station or centimetre-level RTK GNSS receiver. It can support surveying and mapping systems where its range and measurement characteristics meet the project requirements, but it is not a centimetre-precision survey instrument by itself.

The LS74A has an adjustable specified frame frequency of 1 to 10 Hz. This means the measurement update rate can be configured to suit different monitoring and integration requirements.

The LS74A uses a 905 nm laser wavelength. This near-infrared wavelength is commonly used for Time of Flight distance measurement and LiDAR sensing.

Yes. According to the manufacturer, the LS74A is designed to comply with Class 1 laser eye-safety requirements and relevant IEC 60825-1 standards. Users should still follow the operating instructions and should not look directly into the operating laser through magnifying devices such as microscopes or optical magnifiers.

The LS74A communicates through a serial TTL interface. This allows the sensor to be connected to an external controller, embedded computer or other compatible system for receiving real-time distance measurements, sensor status information and configuration data.

The LS74A communication protocol uses a baud rate of 115200 for its TTL serial connection. Integrating equipment should be configured according to the manufacturer's communication protocol and electrical requirements.

The LS74A can provide real-time ranging information together with device and status data. The documented data packet includes distance information, device configuration information, APD temperature, version information and other internal status values used by the sensor and integration software.

Yes. LS LiDAR provides data display software for the LS74A. The software can show the current measured distance in real time, display measurements as a changing graph, show configurable parameters and provide system messages.

Yes. The manufacturer's data display software includes a save-data function for recording distance measurement information. Developers can also obtain ranging data directly through the TTL serial interface when integrating the LS74A into their own hardware or software.

The LS74A documentation specifies an XH-4P connector interface together with wiring for power, ground, transmit, receive, control and I/O connections. Installation and wiring should follow the manufacturer's pin definitions to prevent incorrect operation or damage.

The LS74A supports an operating voltage of approximately 5 to 12 V. The manufacturer specifies power consumption of no more than approximately 1.5 W, making it suitable for integration into compact and power-sensitive systems.

The LS74A measures approximately 24 × 24 × 47 mm. Its compact form factor allows it to be incorporated into equipment where installation space is limited.

The LS74A weighs approximately 20 grams. Its low weight makes it suitable for integration into portable equipment, robotics and other systems where sensor mass needs to be kept low.

The specified operating temperature range is approximately -20°C to +65°C. The specified storage temperature range is approximately -20°C to +85°C. The sensor should still be installed and operated according to the environmental requirements in the manufacturer documentation.

The manufacturer specifies that the LS74A should be secured using the mounting holes on both sides of the sensor. The mounting base should hold the unit securely and provide suitable heat dissipation while keeping the optical window clean and unobstructed.

Yes. Fingerprints, mud, dust, leaves, insects and other contamination on the optical surface can affect ranging performance. The optical window should be kept clean and handled carefully according to the manufacturer's maintenance instructions.