2 Pack Ultrasonic Atomization Maker 20mm 113KHz Mist Atomizer DIY Humidifier with PCB 3.7-12V

This is my first project using an Ultrasonic Mister like this so I expected a learning curve. I needed to modify the board slightly hence the jumper wires in the photo. It is being used to adjust the humidity level inside a closed system. At first I thought something was wrong with the unit but as I adjusted the level of the Atomizer plate shallower in the water it begin to "mist". If the Atomizer unit is completely submerged it will not function. Seeing the mechanics of it now the harmonic plate needing to not be submerged makes sense. Puts out plenty of mist for a single unit.

Works well, pumps out a lot of vapour, but you have to make something to hold the ultrasonic disks in place, which needs to be exactly parallel on the surface of the water otherwise the cables are a little short so they pull them sideways and they down work.

all good

These misters work decently well. I had to unsolder the barrel Jack connectors and add wires for power because the barrel Jack that comes with these is way smaller than standard size. The mister must be kept above the waters surface in order to work. If it’s submerged at all it doesn’t produce any mist.

These are SUPER hard to use. I've tried so many different things to get them to work and I've only got it to work a couple of times for any extended period of time. It is sensitive to the water level within fractions of a millimeter.- On top of the water's surface it will only give a little poof of vapor if you put a drop to prime it- Just below the surface and they aren't strong enough to put anything out- Just at the surface it will depend on literally fractions of a millimeter. If you can get it to sit at the right height, sometimes they'll put out some nice vapor for a while but usually they'll only give a little poof and then stopTo make it even more complicated, the wires are super short AND some brainiac decided to make it so you need to press a tiny button to start it instead of just running when plugged in. So I am forced to come up with a more complex system using transistors to trigger it in addition to just controlling the power just so it will run in an automated system I'm designing. Totally doable but ugh.I would love to see the setup people are using to get these things to work regularly. Ultimately, they're so finicky that I really wish I had just spent the money on a submergible single unit at the same price.

Didn't work. I returned them. They wouldn't stay upright in fluid, but kept tipping over. I was trying to use them for a theatrical effect, but no luck.

I needed some ultrasonic atomizers for 91% Isopropyl, and this was just the thing I needed these work great. Discs will degrade in time but that is par for the course.

Puts out a small fog and 2Ah at 5V lasts over a day. Perfect for my need to cool a heatsink to below ambient

Its perfect for my mini mushroom greenhouse automatic system.Yes its a(2) naked pcb and have to do something to hold it and make it all nice.. ...but it was expected!I also like the simplicity and no annoying flashing lights.

Just a quick edit here - The company has reached out to me to correct the faulty board (based on this review). My replacement arrived very quickly and I'm impressed. I hadn't even contacted them as I thought the frustration would not be worth the $20. It's really great to see when a company actually cares about customers and makes it very easy to deal with.Thank you again Crisdy.______________________________________________I bought these for a project I'm working on. One of the boards is dead after approx 6 hours of operation. The other is still going strong. Both piezo transducers are still working, although they have different outputs (using the same circuit board and same settings), one piezo produces about 80% of the other.Regarding how to best get these producing vapour, the best method is to always ensure there is water in constant contact on the back of the piezo, and leave the front side clear. The best way I found to do this was using a plastic water bottle and cutting a hole in the top of the lid. Piezo gets installed between the lid and the bottle (sandwiched between lid and bottle when you put the cap on). Bottle laid on it's side results in water always on the back and a good stream of vapour coming out the front.Regarding measurements6V = 360mA12V = 170mA24V = 70mAThese boards are rated for max 12V but it's the other board that died, not the one I've been testing voltages on.They also produce about 380mL of vapour at best, closer to 300mL in some cases.Bottom line - They're great for trying things out and playing but don't expect reliability or accuracy. At this affordable price, it's easy to just replace it when it fails if you're using them for little home projects.

The package came with only one unit when I ordered the 2 pack

Works amazingly well! But I only received 1 when I ordered 2.

The polarity of the connector is not listed or on the PCB.The dimensions for the pin and sleeve of the dc plug are also not specified.