YDLIDAR X3 Lidar
Compared with other lidar modules on the market, this YDLIDAR X3 Pro lidar is more cost-effective. Using triangular ranging technology and serial communication, the detection radius is about 8m, which is enough for indoor projects. It comes with a motor driver that can automatically adjust the scanning frequency, X3 Pro with sampling frequency is 4000 times/S. 
 
Features
1) Cheaper and small size.
2) Ranging range is 8 meters, suitable for indoor projects.
3) X3 pro sampling frequency is 4000 times/s, it can adjust scanning frequency automatically.
4) Can be used for ROS educational robots, open source hardware, UAV mapping and obstacle avoidance, synchronous positioning and navigation.