Hi Marco, It sounds like the units are vibrators not ultrasonics. We
sell ultrasonics and repair all makes and models of jewelry
equipment. Usually the small units like you are talking about just
vibrate the liquid. This is not the same as an ultrasonic cleaner.
Ultrasonics use sound waves to clean. I have written an article about
them that is free to download at
It should be helpful to you in your research on getting an
ultrasonic cleaner. Also a lot of what is in this article has been
posted on orchid over and over in the past year and a half. Look in
The article also tells how to test a sonic using aluminum foil. It
is easy and only takes a minute to test the unit. Do keep in mind the
smaller the unit the less powerful it will be.
Be sure not to use any plastic in an ultrasonic and don’t place
anything on the bottom of the tank. The reasons for this are
explained in the article.
If you have any questions please let me know by email or calling our
toll free number 1-877-262-2185.