Magnus Engineered Equipment (MEE) produces the most powerful ultrasonics for cleaning applications. MEE manufactures ultrasonic transducers which operate at 20 kHz which is 25 times more powerful than the 40 kHz transducers supplied by other suppliers of cleaning equipment. The transducers are made with continuously laminated magnetostrictive 20 kHz elements which deliver more uniform cleaning than the discretely mounted piezoelectric elements used in 40 kHz transducers.
Comparison of 20 kHz vs 40 kHz Ultrasonics with Household Aluminum Foil
Figure 1 shows the difference in cleaning power between the two types of transducers. The 20 kHz transducer will perforate and tear the soft household aluminum foil whereas the less powerful 40 kHz transducers will only dimple the aluminum foil.
Figure 2 shows the difference in construction of 20 and 40 kHz transducers. The weaker 40 kHz transducers are bonded to a thin stainless steel sheet to minimize the loss of energy from the piezoelectric elements. The weak stainless can readily flex between the elements and thus transfer the energy to the cleaning solution. This thin stainless steel sheet is prone to develop porosity and limits the 40 kHz transducer to a lifetime of 2-3 years. The more powerful 20 kHz elements are continuously bonded to a thick stainless steel sheet which prevents porosity and greatly extends the life of the transducer. The uniform bonding delivers a more uniformly sonicated cleaning solution which in turn delivers more uniform cleaning.