Slamtec RPLIDAR S2L 18m 360-Degree DTOF LiDAR with UART

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It uses direct time of flight (DTOF) to deliver angle-and-distance measurements for environmental perception. The S2L balances 32K sampling with an 18 m white-target range and an 8 m range at 10% reflectivity. It keeps the 1 Mbps UART workflow of the S2 family while offering a different range and accuracy specification, making exact-model selection important. The 3.3 V TTL UART, 1 Mbps interface supports integration into a suitable host controller. Review the model-specific electrical requirements and official technical documents below, then evaluate the sensor on the actual surfaces, lighting and robot mounting arrangement. Features Model-specific ranging - 0.05-18 m at 90% reflectivity; 0.05-8 m at 10%. Dense scan acquisition - 32,000 samples/s provides the range measurements used by mapping and perception software. Controlled scan timing - 10 Hz supports repeatable updates of the surrounding scan plane. Angular sampling - 0.1125° defines the sampling detail at the stated scan setting, not guaranteed object-detection accuracy. Controller interface - 3.3 V TTL UART, 1 Mbps; use the corresponding electrical interface and driver profile. Compact mechanical integration - 77 × 77 × 38.85 mm with 185 g typical mass supports enclosure and mounting planning. S2L-specific ranging specification - The corresponding S2L datasheet specifies 18 m at 90% reflectivity and typical ±50 mm accuracy. Do not substitute the S2/S2E 30 m range or ±30 mm figure. Official development tools - SLAMTEC provides C++ and ROS-family integration resources. Use the relevant model and transport configuration, then validate scan output before connecting navigation logic. Laser classification - Class 1 under the manufacturer's specified operating conditions. The lidar is a perception component, not a substitute for a certified machine-safety system. Sensor and cable view for integration referenceS2-series serial and Ethernet form factors for integration comparisonProtected housing for compact robot integration Specifications Parameter Value Model SLAMTEC S2L Ranging principle direct time of flight (DTOF) Scan coverage 360° Distance range 0.05-18 m at 90% reflectivity; 0.05-8 m at 10% Sample rate 32,000 samples/s Scan rate 10 Hz Angular resolution 0.1125° Distance resolution 13 mm typical at 90% reflectivity Ranging accuracy ±50 mm typical at 90% reflectivity Data interface 3.3 V TTL UART, 1 Mbps Power supply 4.9-5.2 V DC; 5 V typical Dimensions 77 × 77 × 38.85 mm Weight 185 g typical Operating temperature -10 to +50 °C; startup at 0 °C or above Laser safety Class 1 Enclosure rating IP65 Operating current 500 mA typical, 600 mA maximum at 5 V and 10 Hz Startup current 1,500 mA typical Product Comparison Model Rated Range / Target Sample Rate Interface Weight S2L 0.05-18 m at 90% reflectivity; 0.05-8 m at 10% 32,000 samples/s 3.3 V TTL UART, 1 Mbps 185 g typical S2 0.05-30 m at 90% reflectivity; 0.05-10 m at 10% 32,000 samples/s 3.3 V TTL UART, 1 Mbps 185 g typical S2E 0.05-30 m at 90% reflectivity; 0.05-10 m at 10% 32,000 samples/s Ethernet UDP, 10/100 Mbps 190 g typical Reflectivity and operating mode matter: maximum range is not guaranteed on every object. These are range sensors; the host controller supplies SLAM, path planning and robot-level decision making. Application Mobile Robot Mapping Use S2L scan data to build occupancy maps and match successive scans against stable walls or structures. Its 0.05-18 m at 90% reflectivity specification helps define the scale of the mapping workspace; a host-side SLAM algorithm and a correctly calibrated sensor frame are still required. Obstacle Awareness and Local Planning Feed range returns into a local cost map to identify objects intersecting the scan plane. Set the mounting height around the obstacles that matter to the platform and combine other sensors for overhanging objects, low obstacles and drop-offs. Cleaning and Room-Scale Service Robots The 18 m white-target and 8 m dark-target ranges fit many room-scale perception tasks. Use the S2L-specific accuracy budget when planning docking aids or wall-following behavior, and retain independent sensing for edges and stairs. Robotics Education and ROS Development Teach laser scans, coordinate transforms and localization with the corresponding SLAMTEC driver. Configure 3.3 V TTL UART, 1 Mbps, inspect scan timing, and verify the base-to-sensor transform before testing autonomous motion. Environmental Surveying Prototypes Collect repeated 2D profiles for layout studies and mapping experiments. Building a three-dimensional reconstruction from a moving scanner requires an independent motion estimate and appropriate registration; the scanner alone does not output a complete 3D map. Embedded Perception Integration Check the optical-window clearance, cable routing, supply ripple and startup current before enclosure design. Validate scan continuity with motors and other high-current electronics running, rather than judging performance from an unloaded bench setup. Reference Documents Manuals and Specifications S2L Datasheet S2 S2L S2P Dev Kit User Manual Software and Development Support Downloads RPLIDAR C++ SDK RPLIDAR ROS 2 Driver Packing List SKU Item Quantity Slamtec-S2L Slamtec S2L RPLIDAR S2 LiDAR Sensor 1 FAQ What is the rated measuring range?0.05-18 m at 90% reflectivity; 0.05-8 m at 10%. Maximum distance depends on target reflectivity, ambient conditions and the selected operating mode.What is the difference between sample rate and scan rate?Sample rate is the number of individual measurements: 32,000 samples/s. Scan rate is how often the rotating scanner updates a full sweep: 10 Hz.Which communication interface does this model use?3.3 V TTL UART, 1 Mbps. Match the host connection and software profile to this exact model, not a similar-looking version.What power supply is required?4.9-5.2 V DC; 5 V typical. Allow for startup current and check voltage at the sensor while it is running.Does this sensor perform SLAM by itself?No. This product supplies laser scan measurements. A host processor running suitable mapping and localization software turns those measurements into maps and robot pose estimates.Can it detect obstacles at every height?No. The laser scans a plane. Mounting height and pitch determine which objects intersect that plane; additional sensing is needed for obstacles or drop-offs outside it.What should I check when comparing similar models?The corresponding S2L datasheet specifies 18 m at 90% reflectivity and typical ±50 mm accuracy. Do not substitute the S2/S2E 30 m range or ±30 mm figure.Which software can I use?Use the official C++ SDK or ROS-family driver in Reference Documents. Select the correct transport, speed and model configuration, inspect live scans, and configure coordinate transforms before using a navigation stack.What is included?Slamtec S2L RPLIDAR S2 LiDAR Sensor: 1 unit. The Packing List records the physical contents of this listing.What should I verify before deployment?Test representative targets, glass, dark surfaces, moving objects and lighting changes. Confirm temperature limits, optical-window clearance, power stability and scan continuity; use independent safeguards wherever people or machinery could be at risk. Show more