Pam Your initial gut feeling is correct. The cheap ones usually end
up being costly as now you have to buy another one ( which you
should have begun with).
They are good for almost nothing. The Transducers, Heaters and Timers
are the guts of your Ultrasonic. The rest is all shell.
These items alone make up the bulk of cost and rest is all labor.
The Chinese can save you on labor but they tend to use cheap parts.
I would not buy anything that cost less than $200.
As anything less expensive is questionable.
Crest makes a good ultrasonic cleaner in Malaysia and has a good
L&R, Gem Oro, Sonic4, Otto Sonic, Health sonic, Branson, Sonicor
are other US Brands.
Elma is a German manufacturer now priced out of the market due to
46 Jewelry Supply, Inc