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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
Ultrasonic Welders Converter Transducer 2000w 20khz For Plastic Welder $427.49$450 eBay - dyjt003 Go to product viewer dialog for this item. For outdoor or wet environments, this IP67-rated sensor
Submersible 1500W 28KHz SUS304 Industrial Portable Ultrasonic transducer Packs Go to product viewer dialog for this item. For outdoor or wet environments