There are a lot of different sizes, models, brands, and manufacturers out there. How can you tell which cleaner is the best one for your needs? Let us help, that's how. Read on for more info...
To narrow down all of the possibilities, let's eliminate the tanks that are too large. These would be the ones that, if you look at the majority of your parts, leave a lot of extra room. Strive to fit most of your pieces - the really big ones can be done in steps.
You will also want the capability to make your tank hot. Really hot, as in 140 degrees Fahrenheit. At this temperature, ultrasonic frequencies move more easily through water, and your tank, all other things being equal, will clean better, and run more efficiently. If you can't afford a heated tank, you have to option of refilling your tank with pre-heated water. It works just fine.
You are going to have to have a parts basket of some kind as well. It is never a good idea to simply rest your parts on the bottom of the tank for two reasons: First, if your tank is hot, or your cleaning solution is not 'skin friendly' it may be difficult to retrieve your parts. Secondly, the bottom of the tank is also the radiating surface. Keep your parts of the bottom for best transmission of ultrasonic power into the water.
When your equipment is all picked, it is time to choose your cleaning liquid. While some parts can be cleaned simply using hot water and ultrasonic energy, most parts will require some help from chemistry. Pick a solution that is designed to remove the soils you are concerned with. And don't forget to make sure that the solution will not harm the objects you are cleaning. For instance, aluminum parts do not play well with strong alkaline chemistries.
Finally, we can go ahead and lay out some cash - but wait, there's more... As in all things, you get what you pay for. Spend a little extra and make sure you are dealing with a reputable company that understands ultrasonic cleaning, and honors their warranties. Call them and ask questions until you are sure they are on the up and up. It is a little extra work, but well worth it.