Smraza Ultrasonic Sensor for Arduino, HC-SR04 Distance Sensors with 8pcs Mounting Bracket for Arduino R3 Compatible with MEGA2560 Nano Robot XBee ZigBee, Set of 8 S03-CN : Amazon.ca: Electronics
SEN0001 Dfrobot, Ultrasonic Sensor, URM37 V5.0, For Arduino & Raspberry Pi Development Boards
HC-SR04 Ultrasonic Ranging Sensor in Canada Robotix
MB7389 x Arduino Tutorial [With Code Examples] – MaxBotix
Build an Ultrasonic Intruder Alarm with LED Indicator
Sensors | Free Full-Text | A Multi-Sensor Fusion Approach Based on PIR and Ultrasonic Sensors Installed on a Robot to Localise People in Indoor Environments
Measuring Module Ranging Ultrasonic Distance Sensor for Obstacle Avoidance in Raspberry Pi or Arduino Projects Pack of 2 : Amazon.ca: Industrial & Scientific