SparkFun ElectronicsUltrasonic Sensor | SEN-13959Sensor Development Boards and Kits

Ultrasonic Sensor Product Description

This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.

With only 4 pins to worry about (Power, Trigger, Receive, and Ground), you’ll find this sensor easy to set up and use for your next range-finding project.