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HC-SR04 Ultrasonic Sonar Distance Sensor + 2 x 10K resistors Adafruit Industries Go to product viewer dialog for this item.

Available at Adafruit Industries , this ubiquitous sensor is ideal for distance measurement (2cm to 400cm) in robotics and interactive art. A02YYUW Waterproof Ultrasonic Sensor DFRobot& more Go to product viewer dialog for this item. buy ultrasonic transducer

A linear array probe used for vascular and musculoskeletal exams, also found at reLink Medical . Ultrasound HC-SR04 Ultrasonic Sonar Distance Sensor + 2 x

Submersible 1500W 28KHz SUS304 Industrial Portable Ultrasonic transducer Packs Go to product viewer dialog for this item. A linear array probe used for vascular and

For outdoor or wet environments, this IP67-rated sensor available at DFRobot offers stable performance with a UART interface. Adeept Ultrasonic Distance Sensor Starter Kit with Uno R3 RobotShop.com& more Go to product viewer dialog for this item.

A reliable industrial transducer for precision cleaning available at Asonic .

Industrial-grade transducers are designed for high-power continuous or pulse operations, such as ultrasonic cleaning tanks or plastic welding machines. Ultrasonic Transducer 60W 40kHz Go to product viewer dialog for this item.