MAR series Ultrasonic Sifter System is a professional ultrasonic screening system, which is composed of ultrasonic generator and screen transducer. It can meet the use range of 28 ~ 38kHz frequency. The system can automatically track the best resonant frequency and compensate for the detuning caused by heating and other reasons; It can also be added to any new or existing vibrating screen; https://www.jydultrasonic.com/ul...sonic-sifter-system.html