Optimal way to mount 3 ultrasonic transducer onto a stainless steel tray

[Shay]

Hello,

I'm seeking guidance on the optimal method for mounting ultrasonic transducers to minimize potential issues related to interference or standing waves.

I have three 40W 40kHz ultrasonic transducers, typically utilized for ultrasonic cleaners.

Given that the tray is approximately 20cm x 20cm x 20cm (equivalent to 8 liters, with a recommended power of 10W per 1 liters), I am contemplating mounting three of the 40W transducers, each running at about 35W RMS, to enhance longevity and reliability.

One approach involves arranging them in a row beneath the tray. Alternatively, a triangular configuration could be employed. Another option is to mount one on the bottom, one on the right wall, and one on the left wall.

I am uncertain which placement would be most optimal for these transducers. The cleaner will primarily be utilized for cleaning PCBs.

Thank you.

[ch_scr]

From my understanding, there will always be standing waves. One can either sweep the frequency to make them move, or move the item to be cleaned. The energy distribution can be visualized by sonicating a piece of Al foil in the water bath. One would want an "about equal" distribution of the holes pierced into the foil. But AFAIK, there will always be some kind of "main lobe".

[moffy]

I might try the three inline but if they are externally driven you can always play with the phase between the transducers to play with the interference patterns maybe even modulate the phasing, something to experiment with.