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.
Ready to ship All-Terrain 4WD Robot Platform. This robot has a RunCam2 HD camera, 122RPM motors, and can handle most terrain with ease!
LT2/F w/Arm "Bulldog" - Advanced Package with additional customization