Parallax PING))) Ultrasonic Sensor #28015 (POLOLU-1605)

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This easy-to-use distance sensor from Parallax employs sonar to detect objects from approximately 0.75 – 120 inches (2 cm – 3 meters). The Ping distance sensor has status LEDs and requires only one I/O pin. The on-board three-pin header makes the PING))) compatible with a solderless breadboard.

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Why is this so much more expensive than an HC-SR04 ?

Hi Ray,
The PING))) has a different connection interface requiring only 1-wire instead of 2 as per the HC-SR04. They also provide some sample code to get started, however I’d imagine for most projects, the HC-SR04 will work just fine.