Swiss Artech ultrasonic sieving system is the state of art technology in the world. The outstanding feature of it is the frequency variation which greatly improve the stability and efficiency. Meanwhile,it has unique design, for example the converter is always outside powder flow thus no material can sticking on it,and sieve mechanics can be made by customer himself, no tuning of mesh waveguide necessary.The round, quadratic, rectangular and any other shapeofframe ispossible. It is almost no overload possible because of no Phase regulation but forced oscillation. Thick glue layers and wire diameters only reduce amplitude but do not stop generator from working It is with Explosion proof . No converter and cable inside machine thus standard converters and cables can be used resulting in lower cost. Frequency variation around resonances generates less heat because the amplitude is high only for short time when frequency gets through the resonance.