A high-power converter for plastic welding applications, found on eBay.
Submersible 1500W 28KHz SUS304 Industrial Portable Ultrasonic transducer Packs Go to product viewer dialog for this item. buy ultrasonic transducer
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