Ultrasonic transducer can be used in industrial cleaning and welding application. The most common frequency are 25KHz, 28KHz, 40KHz, 68KHz, 80KHz, 120KHz, 130KHz, for cleaning and 15KHz, 20KHz for welding. The output power are 30W, 50W, 100W, 1000W, 1500W and 2000W.