This Ultrasonic scanner is made by Devantech that has a longer range than the SRF04.
This great sonar ranger from Devantech offers an amazing wide range from 3cm to 6m. Unlike the SRF04, the SRF08 is interfaced using the IIC/I2C bus. There is an additional photocell sensor on the front of this detector.
This is a direct drive 4WD programmable Arduino robot platform for indoor robotics. Using 4 Nexus mecanum wheels, it can vector in any direction.
YDLIDAR G4 LIDAR is a 360-degree two-dimensional laser range scanner (LIDAR)