Grove - ultrasonic distance sensor 3-350cm Botland - Robotic Shop
GitHub - Seeed-Studio/Seeed_Arduino_UltrasonicRanger: This library provides a code to measure the distance to obstacles in front and prints the distance value to the serial terminal or LCD.
HC-SR04 Ultrasonic Sensor Range Distance Measuring Module Compatible for Arduino - AliExpress
Water Proof Ultrasonic Ranger- JSN-SR04T | Makerfabs
Measure Distance! - Hackster.io
Ultrasonic Sensor Pack (W43055)
Ultrasonic Ranger - SODAQ Support pages
101020010 Seeed Studio | Distributors, Price Comparison, and Datasheets | Octopart