Can an ultrasonic fogger be set to a lower frequency to increase droplet size?

Mike Young · Feb 25, 2011

Or is 5-10 microns the limit of what can float in the air easily?

Assuming you could adjust ultrasonic to give you proper droplet size, could you manipulate the larger/heavier droplets upward toward your roots with air?

I'd be interested in foggers if they could be adjusted. I would REALLY like to see an ultrasonic fogger built to a proper size

12" diameter should do.

PetFlora · Feb 25, 2011

pond foggers cannot handle high ppms > 400. Even if they could, they generate a huge amount of heat that would likely destroy micro, if not macro nutrients. hth

Atomizer · Feb 25, 2011

Mike,
Instead of float, you could say 5-10 micron droplets fall slower than larger droplets. Gravity and/or evaporation always win in the end

Serapis · Feb 25, 2011

PetFlora said:
pond foggers cannot handle high ppms > 400. Even if they could, they generate a huge amount of heat that would likely destroy micro, if not macro nutrients. hth

I use a fogger in a five gallon bucket. What heat are you talking about? Mine doesn't get hot at all.

Little Tommy · Feb 25, 2011

My fogger is about 2" in diameter and generates heat below the water level to create the fog. It is only hot when it is not under the water line.

Mike Young · Feb 25, 2011

I'm not concerned with heat. Heat can be dealt with. What I was hoping is that maybe atomizer or somebody knew if you could adjust the frequency on foggers to make larger droplets?

baconpopcorn · Feb 25, 2011

I've always wondered this, how well do foggers work in a 5gal bucket for a fog-aero setup?

Serapis · Feb 25, 2011

baconpopcorn said:
I've always wondered this, how well do foggers work in a 5gal bucket for a fog-aero setup?

they work awesome!

and the foggers do not generate fog by using heat...... They use ultrasonic wave technology. There are two main parts of an ultrasonic fogger. The first is a sensing probe that will detect the fogger is in water and that the water level is sufficient for the fogger to work. The second key component is the transducer plate. This plate emits ultrasonic waves that break up the water into three to five micron particles. The particles form a cloud over the surface of the water, dissipating through the area. I haven't come across anything about increasing the micron size, but they can transfer nutrients and insecticides through the fog. They were first designed for reptile terrariums, and have since been used to disperse insecticide like a mosquito fogger and most recently, by the horticultural industry, for starting clones and misting seedlings.

I used my fogger to root 5 cuttings in a 5 gallon bucket. My water did not get hot, neither did the fogger. Hell, it sits inside a plastic float, if it was generating any kinda heat, that would be poor engineering now wouldn't it? I've picked mine up while it was running. I have the single plate one LED version. The LED is red.

Mike Young · Feb 25, 2011

Mike Young said:
I'm not concerned with heat. Heat can be dealt with. What I was hoping is that maybe atomizer or somebody knew if you could adjust the frequency on foggers to make larger droplets?

Yeah, I'm quoting my own post, because it has a relevant question I want an answer to. If you wanna talk about "if foggers work" there's a thread for that.

Serapis · Feb 25, 2011

well that's too tough, because the post I WAS replying to asked if they worked well in an aero set up.... You don't run this thread or this site buddy, tone it down and have a smile....

Mike Young said:
Yeah, I'm quoting my own post, because it has a relevant question I want an answer to. If you wanna talk about "if foggers work" there's a thread for that.

Mike Young · Feb 25, 2011

Serapis said:
well that's too tough, because the post I WAS replying to asked if they worked well in an aero set up.... You don't run this thread or this site buddy, tone it down and have a smile....

I have a question to which you do not have the answer. And to which baconpopcorn definately doesn't have the answer. Thanks for stoppin by.

RawBudzski · Feb 25, 2011

I have the answer. the answer is Yes.

Serapis · Feb 25, 2011

I've already told you, the answer is no. I did a lot of research on these before buying one, there is nothing you can do to make the droplets bigger, period. That answers the question in the subject line. As for your wanting a 12" diameter fogger, whatever floats yer boat mate..

Mike Young said:
I have a question to which you do not have the answer. And to which baconpopcorn definately doesn't have the answer. Thanks for stoppin by.

Mike Young · Feb 25, 2011

Serapis said:
I've already told you, the answer is no. I did a lot of research on these before buying one, there is nothing you can do to make the droplets bigger, period. That answers the question in the subject line. As for your wanting a 12" diameter fogger, whatever floats yer boat mate..

Your opinion will be noted. Thanks for stoppin by.

RawBudzski · Feb 25, 2011

Last POST woo I win.

Atomizer · Feb 25, 2011

The reason it can`t be done is a 50um droplet weighs 125x more than a 10um droplet. Think of it as a bowling ball compared to a golf ball. A 3um droplet is a ping-pong ball

Deximus · Feb 28, 2011

It can't be done because a piezoelectric element for a fogger electromechanically resonates at too high a frequency. If you took a small element that resonates at > 1 MHz and fed it even a 100 KHz signal (which is probably still too high for aero), it wouldn't vibrate with enough amplitude to do anything useful. You would have to increase the power so high that the element would crack instantly.

Can an ultrasonic fogger be set to a lower frequency to increase droplet size?

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