For sale: Misonix Sonicator 3000, and what is missing from it
A 550W ultrasonic processor generator that powers on and runs its menu. It has no converter and no horn, and the listing says so in the title.
This is a Misonix Sonicator 3000. It is a 550 watt, 20 kilohertz ultrasonic liquid processor. It powers on and runs its menu.
It is also generator only. There is no converter and no horn. That is most of what makes a sonicator a sonicator, and it is why this listing costs what it costs.
I want to spend this post on the missing parts rather than the present ones, because that is the honest way to sell this and because the reasoning is useful.
What a sonicator does
It destroys things with sound.
The generator produces a high frequency electrical signal. The converter turns that signal into mechanical vibration, using a piezoelectric stack. The horn, a shaped metal probe, concentrates that vibration and delivers it into a liquid.
What happens in the liquid is cavitation. The probe is moving so fast that the liquid cannot keep up with it, so microscopic bubbles form and then collapse violently. Those collapses are, locally, extremely energetic. They shear apart anything nearby.
Labs use this to rupture cells and release what is inside them, to break up clumps of particles into an even suspension, to emulsify liquids that do not want to mix, and to speed up reactions.
So what is actually here
| Part | Present |
|---|---|
| Generator / power supply (550W, 20kHz) | Yes. Powers on, runs the menu |
| Converter (the piezo stack) | No |
| Horn / probe | No |
The generator is the electronics and it is the part that most often fails, which is precisely why a standalone generator is worth something. Converters and horns are consumable in a way the generator is not. Horns erode: the tip is being eaten by the same cavitation it produces, and a lab replaces them.
Who this is for
Someone who already has a Misonix converter and horn, and whose generator has died.
That is a real person. If your generator is dead, your converter and horn are almost certainly fine, and a replacement generator is exactly what you need. Buying a whole new system to get one working box is precisely the waste that a healthy used market exists to prevent.
It is also for a lab or a repair shop that wants a spare on the shelf.
Who this is not for
Anyone who wants to start sonicating on Monday and does not already own the rest of the stack. You would need to source a converter and a horn, and by the time you have, you may well have been better served buying a complete system.
I would rather say that plainly and lose the sale than have somebody open the box expecting a working instrument.
The general point
A lot of surplus lab equipment is sold as a complete instrument when it is not, because the seller does not know which parts are load bearing. “Misonix Sonicator, powers on” is a technically true listing for this item and it is deeply misleading.
We put “generator only, no converter or horn” in the title, which costs us a substantial number of clicks from people who wanted a whole sonicator. Those clicks would have been worthless anyway. The people who need exactly this know what they are looking at, and they are who this listing is for.