Very impressed with this ultrasonic cleaning machine. Although it states its for jewelry I am using it primarily for cleaning small lab equipment. Since this unit includes a heating option it is very effective for helping me get things clean before going into the autoclave. I did clean some jewelry when it first arrived and it did a very good job. One of the rings I have is a damaged ring that had a slab of black onyx and a diamond mounted in it. The onyx was cracked in half so I knew I was taking a risk when I started. I wanted to see how strong the device was. I have used the smaller units that are in the 20 dollar range and it never caused any issues with the ring, it also never seemed to make a difference when cleaning. This device actually finished the break and caused the onyx to fall out. This may sound bad, but it isn't. Its great as it proved to me that the unit is more powerful than the cheaper ones and it is actually moving things around. The ring needed repair anyway so this was my perfect test. The other rings (a college graduation ring and sports award ring with many deep groves) came out very clean and there was a mild dirt residue left over after a 30 min cleaning session. Again, this tells me the device is doing its job. There are many junk cleaners available online, this is a higher quality cleaner in my opinion. I feel there is no comparison between this and the cheap ones. For my metal lab items, its done a great job and made my clean up time so much shorter. It removes the stuck on gunk so I don't have to. Great item IMO and well built. Don't waste your time with the cheap cleaners made of plastic. Spend a little more and get a quality device.

so tested this with alot of things in alot of ways, baggies over all worked the best to put just water into the tub, and then have you solution in the baggie this way you dont have to clean out the tub each time you run it, but this limits you to smaller items for cleaning, there seems to be one ultrasonic emitter and a lower power one at that, but, it still does a good job it just might take longer then you think, more so if you just been watching videos on it and think these clean in 20 seconds or so tarnish and melted plastic from 3D printers were the hardest to get off, the 3D printer parts did not fully come clean, the broch took about 2 hours to remove about 85% of the old silver tarnish the rusty bits cleaned up in one run of 20 minutes however as I did not oil them right after they kinda got rusty again ^^;

Pros: • Versatile Cleaning: While marketed for jewelry, this ultrasonic cleaner excels in a wide variety of items effectively. • Heating Function: The built-in heating option enhances cleaning performance. • Quality Construction: Solid build quality compared to cheaper alternatives. • Compact and Efficient: Despite its power, it remains compact and light, making it convenient for various applications. Review Summary: My primary use for the Roomark Ultrasonic Cleaner is to clean aviation components at my place of work with isopropyl alcohol. It has been very effective in removing dirt, grease and other particles from small parts. Final Thoughts: This Roomark Ultrasonic Cleaner is similar to the models found in Harbor Freight but I feel this unit is of a superior quality. Its compact design belies its potent cleaning capabilities, making it a worthwhile upgrade from cheaper, less effective alternatives. For anyone looking to enhance their cleaning regimen with a robust, well-built device, this cleaner stands out as a solid choice. This is a review of a product received for free via the Amazon Vine Program. I strive to provide helpful and unbiased opinions of the product. I focus and score based on a few areas of each product. Cost vs quality, functionality and comparison to other similar products.

This thing moves! I've used other models, and to be honest the last one I wasn't sure if it was even on; I couldn't hear or feel the vibration, and the parts came out nominally the same as they went in. With this cleaner though - there is ZERO doubt it's working. It's audible, and can be felt if you touch the case of the machine. The heater is a nice touch, to keep your cleaning solution nice and warm. The only thing it's lacking is a drain valve; with this model you have to dump it out via the top of the cleaning tank.

Pros: I got this since I like to work on small engines. This ultrasonic cleaner is effective at breaking down carbon deposits on carbonators and helps to degrease chains very well. In the past I’ve only used smaller ultrasonic cleaners there were meant for jewelry. This one is much more effective. Due to having a built in heating element, it has extra cleaning power by having a hot cleaning solution. The digital readout shows current temperature and your “set” temperature. You can operate the heating element and ultrasonic motor independently. The ultra sonic function only has 1 “speed setting” and the only adjustment is the timer. I love how the whole equipment is made from stainless steel so its easier to clean up messes. Cons: this cleaner is loud. I cant use this in my house, I have to keep it in the garage while in use. As you raise / lower the basket into position, the intensity of the noise changes. If you fill the container up and place large material into the basket, the “waves” don’t propagate to the top of the liquid surface. Overall: I only plan to use this a few times. Since its so loud im going to be looking for a different model.

I have quite a few different ultrasonic cleaners. One might wonder, why would you need more than one ultrasonic cleaner? Well, would you fill up a 30 L ultrasonic to clean your tiny airbrush? And would you try to shove a carburetor into a 1 L when it just won't fit? So, the usefulness of owning several ultrasonic cleaners of various sizes is pretty simple. This 6.5 L cleaner is an excellent mid-size cleaner. It comes with a Jewelry ball, which is a neat little thing you can put your small airbrush parts in, among other things, and not have to fish around in the ultrasonic to find them. it's big enough for things like, jewelry, glasses, gun parts, things like that. It's probably a bit small for bigger car parts (check out their 15 L and 30 L models for things like that). If you're looking for a "one size fits all" ultrasonic, this 6.5 L (or the 10 L) are good choices. But if you have the money and the room, I recommend getting a few different sizes. This has good ultrasonic power, and decent heater power, but at only 100 watts of heating power, make sure you give it a little time to come to temperature. 5 or 10 minutes of "pre-heating" will help a lot. It gets pretty warm and works well, but it has quite a volume of liquid so it takes a little time is all. In all, this is an excellent mid-size ultrasonic cleaner with all the bells and whistles. It works well and is a piece of cake to operate. I'm quite happy with how well it works, and it'll get used a LOT. 5 stars.

The Roomark Ultrasonic Cleaner, 3.2L, works well but the cleaning tub is smaller than I expected. The tub is about 3.5" deep and while it does hold 3.2L (108oz.) of fluid, it just barely does so with nothing else in the device. The practical cleaning area inside the unit is roughly 5.5"x9.5"x3.5", so anything larger won't fit. Otherwise, it performs as expected, effectively cleaning the items that do fit. In hindsight, I probably should have opted for the next size up. If you have larger items to clean, consider a bigger model. For smaller items, this cleaner does a great job.

used this to clean the carburetor of my gas powered pressure washer as it had gummed up over the winter, worked great to get it all cleaned out and looking new again!

The Roomark Ultrasonic Cleaner, 6.5L Ultrasonic Cleaning Machine with Digital Timer & Heater I received takes a while to heat up- be patient with it and let it heat up to temperature before starting a cleaning cycle. The listing says this is a 200w machine. That is misleading. I believe.the error may be in confusing models with actual power consumption. This particular machine appears to have a 100w heater, and a 185w sonic transducer circuit. The sonic cleaning effect works best using solutions taylored to what I'm trying to clean vs using straight distilled water. The tank can be emptied easily with its side valve- that's quite handy. The controlls are easy to press and program. I also like that it has a "mains" toggle switch for power. Basically what the listing shows is tracking with what I received except for the total power consumption. Providing a simple chart of all the models and features on the listing photos would end the guessing imo.

This is a good sized, amply functional ultrasonic cleaner. The drawbacks are few, but the on and button adjust beeps rival a smoke detector for loud and shrill and the lid comes with doggedly stubborn cellophane coating that could easily have been made simpler to remove. I was able to fit a good sized clock mechanism into the bath and a gentle cycle did the trick. I’m very pleased overall.