. These are low-cost, easy to interface with microcontrollers like Arduino, and typically include both a transmitter and receiver.
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. buy ultrasonic transducer
HC-SR04 Ultrasonic Sonar Distance Sensor + 2 x 10K resistors Adafruit Industries Go to product viewer dialog for this item. . These are low-cost
A high-frequency probe for detailed imaging of internal structures, available at reLink Medical. Philips L12-3 Transducer reLink Medical Go to product viewer dialog for this item. buy ultrasonic transducer