Brand: VEX Robotics
Product Code: 276-2155
Availability: In Stock

Avoid obstacles and measure distances with the ultrasonic range finder. Device emits a high-frequency sound wave that alerts the robot to things in its path. A Programming Kit is needed to change the program in the VEX Controller.

  • Measure distances from 1.5in to 115in.
  • Avoid obstacles.
  • Create more autonomous function.



Function: An ultrasonic range finder sensor enables a robot to detect obstacles in its path by utilizing the propagation of high-frequency sound waves. The sensor emits a 40kHz sound wave, which bounces off a reflective surface and returns to the sensor. Then, using the amount of time it takes for the wave to return to the sensor, the distance to the object can be computed.

Application: The sensor can be used to determine distances to objects. It can be used as a tool to determine if any objects are in the robot’s path at all. To increase the sensing range, the sensor can be mounted to a servo to allow it to rotate.

Technical Specifications

Kit Contents
  • (1)Ultrasonic Range Finder
Downloads & Docs Documentation
Instruction Sheet - Ultrasonic Sensor
Compatibility All VEX Microcontrollers.
3-Wire Extension Cables.
Inputs Start signal to the ultrasonic sensor.
Connect to a interrupt port.
Outputs 3-Wire Cable
Connect to a interrupt port.
Echo response from the ultrasonic sensor .
  • Black:ground
  • Red:+5V
  • Orange/Yellow:control signal
  • Sensor:Ultrasonic Range Finder
  • Range:1.5in to 115in
  • Frequency:40 KHz