Atomizer Ohms: What is that and why is it important?

When you are looking to buy new atomizers (or cartomizers) online, you are now faced with many different choices that were not available before.  you may see a new term popping up called “ohms”.   You may be wondering what that is and what it is for. I lay it all out for you right here.

An atomizer could be thought of as a simple light bulb.  Infact, that is almost exactly what it is in a smaller and less dim version.  A light bulb has a filament that gets hot and produces light.  An atomizer has a filament also.  It just doesn’t produce light (if you don’t consider dim orange glow as light).  An atomizer gets hot but not hot enough to produce any concernable light.

What makes a light bulb produce light?  Resistance.  Lets go back to my electronic theory days :). Resistance is defined as the ability of an object to block electricity.  The higher the resistance, the more electricty something will block.  When blocking that electicity, the energy has to go somewhere.  In a light bulb, the filament wire used is very resistive to electricty.  The wire has to get rid of the energy being run through it since it doesn’t like passing it on as a regular copper wire would.  It gets rid of the energy in the form of heat.  A light bulb filament gets rid of so much heat, it starts to glow and eventually becomes white hot.  That’s why most incandescent light bulbs get so hot.

A filament in your atomizer works exactly the same way.  It’s filament resists the electricty passing through it and gets rid of the extra energy in the form of heat.  That heat is what creates your vapor.

Here is where ohms come in.  Ohms is the measurement of the resistance to electricty of an object.  So when atomizer is 2 ohms, that is the resistance measurement.   Since a normal battery puts out only 3.7 volts, you need a very low resistance to get the filament to heat up.  The lower you go, the hotter it will get but there is a trade off.  The lower you go, the more power the battery has to expend to try and pass electricty through the filament, so the battery will not last as long.

Since most ecig batteries have to run as 3.7 volts, you have to find an ohm value that will get hot enough to produce vapor at the right temperature and not kill the battery in a few minutes.  With 3.7 volts, that just happens to be around 2 to 3.2 ohms for an attomizer value.  Less than that and your battery will get ate up faster.  More than that and you won’t get hardly any vapor.

Now some people run higher than 3.7 volts with eCigarette mods.  This allows you to use higher ohm values.  The Puck ecig mod runs normally 4.8 volts and the 901 atomizer is about 3 to 3.2 ohms.  This makes the perfect combination of power vs battery life (24 hours) = great vapor production.  You can go down as low as 2 ohms like a 510 atomizer is but your battery life is cut in half (about 12 hours).

You will see 510 low resistance atomizers which are below 2 ohms.  These are mostly for 3.7 volts but burn hotter.  Some people like that.  You also have 510 HR (high resistance) atomizers.  These allow you to use higher voltages like 5 to 7 volts and keep a decent battery life.

I live by a philosphy called the sweet spot. It’s my secret weapon in the modding world (and now you know).   I find that to be about 7 watts of power.  At 7 watts of power, you get the best flavor, vapor production and battery life.  That is what my Puck ecig mod is designed around.  You can figure out the power by the following Ohm’s law calculation (don’t get scared, I’ll expain everything :) )…

W = V2 / R

W (power or watts) = voltage squared,  divided by resistance (ohms)

So for my Puck mod, 4.8 volts x 4.8 volts = 23.04 / 3.2  ohms = 7.2 watts (The Sweet Spot)

For a normal 510 battery/atomizer combination…

3.7 volts x 3.7 volts = 13.69 / 2.0 ohms = 6.8 watts (close to sweet spot).

A regular 901 eCig combination…

3.7 volts x 3.7 volts = 13.69 / 3.2 ohms = 4.2 watts (a bit low for the sweet spot). 

Now you see why my Puck mod uses 4.8 volts with a 901 atomizer.

That’s enough electronics theory now.  So you can see where the ohms (resistance) comes in when trying to figure out what atomizer you need as far as ohms.  Shoot for one that will get you 7 watts or a little more and you will be very happy.


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