Ultrasonic Power

Just how it is measured, and how much is too much? I have a cheapo that says it’s 35W and one from a dental lab that says 95W. The 35W takes about 15 to 20 minutes for an average bracelet. Haven’t tried the 95W machine on anything but a dirty clasp at under 2 minutes, but a clasp has all flat surfaces and no dirt holding nooks and crannies. Which would be most appropriate for watch parts?

I see it's been a while since this topic was discussed, but I wanted to ask—has anyone tried different frequencies or power levels for more delicate parts? I’ve heard mixed opinions on whether lower power settings are safer, but I wonder if it depends more on the cleaning solution used. Curious to hear if anyone has experimented with this and noticed a difference in results.

If it's made in China, the rated power is what it puts out right before it melts. Not sure about others.

("What others" someone says in the background).

I’ve had good results with ultrasonic cleaning, but power settings can make a big difference depending on the part. Lower power works well for delicate components, while higher power is better for caked-on grime. Frequency matters too—higher frequencies are gentler. If you're curious about ultrasonic tech in other areas, something like https://www.kaijo-shibuya.com/ultrasonic-liquid-flow-meter/ might be interesting since it applies similar principles in fluid measurement.