Ideal Resistance Level for Rebuildable Atomizer Coils

Often we get enquiries from our customers who complain about their rebuildable atomizers not producing a quality vape or sometimes producing a very harsh vape. This is a very common problem faced by every vaper whether they are just starting out with rebuildable atomizers or even experienced vapers. In this post we would like to address this issue and suggest some tips to build a perfect coil.

Warning – Sub Ohming can be Dangerous
These days the sub-ohming is becoming increasingly popular and we must warn you that its highly dangerous if you don’t understand what potential hazards are involved, therefore we highly recommend you read more about the ohms and wattage levels for the battery you are going to use. We do not recommend making coils below 1ohm if you are new to vaping and we highly recommend getting yourself an ohms tester or a mod which can give you accurate resistance readings.

What is Coil Resistance and why do you need it
This is an essential mechanism required in almost all electronic cigarettes to heat up the liquid and turn the liquid in to vapours. A resistance wire setup usually requires a kanthal wire to be connected between the positive and negative battery posts. When you press the fire switch on an electronic cigarette the circuit is completed and resulting in the negative and positive currents to collide in the middle of the coil which creates heats and hence we get the vapour production. Now in order to control the resistance level, the coils are wrapped around the wicking material. If you have more wraps around the wick, you will then have a high resistance coil and vice versa.

Kanthal Wire Gauge and Resistance Levels
Depending on the gauge or thickness of your kanthal wire you will get different resistance levels, with a thicker kanthal wire usually over 0.25mm to 0.40mm and upwards the same number of wraps would give you a lower resistance coil. Whereas a thinner or light gauge kanthal wire will give you a higher resistance level. This is the reason why thicker kanthal wire is used for building micro-coils.

How does the number of wraps and gauge of the wire effect vape quality
Since taste is subjective, so it can be said that – one man’s ideal coil setup could be a total disaster for another, but there are so many ways a coil can be setup and the vape quality also depends on the output you are getting from your device. A low/high voltage/wattage can also have an affect on the vape quality. You can experiment by making coils with varying number of wraps and see what resistance level suits your taste buds. In general a nicely spread out coil with a 0.25mm guage kanthal having 4-5 wraps should give a resistance of about 1.5ohms and result in a pleasant vape. If you are using a higher gauge wire then you should increase the number of wraps to get the same resistance level. If you are using a lower gauge kanthal wire such as 0.15mm or 0.20mm then you can do 3-4 wraps to get the ideal resitance level. Having said that, if you like vaping on over 4.0 volts or above then you might need to make a few more wraps to get proper falvour otherwise you might get a burnt taste in your vape. If you wish to read more about what causes burnt taste in atomizer then read our article here.

Ideal Gauge for Sub-Ohm coils
In order to make a quality sub-ohm coil you must have a resistance checker which can be a mod, multimeter or an atomizer ohms tester so you can take the coil readings accurately. Any coil which is nearly 1.5 and 1 ohms is considered a sub-ohm coil these days, some may argue but that’s just our verdict, as on these resistance levels the vapour/flavour production becomes intense. The ideal gauge for a sub-ohm coil is about 0.28-0.32 guages. This again depends on your personal choice and experience. With a 0.28 coils it would normally take about 10-12 close wraps to build a good coil reading nearly 1ohms and if you increase the wire thickness – lets say a 0.32 gauge wire, then you will require less wraps on your coil to achieve the same resistance level.

Once again, sub-ohming is dangerous and you would need high wattage batteries to do sub ohming like the Samsung ones we sell here, and you must do your proper research before attempting anything to do with sub-ohm coils.

16 comments on “Ideal Resistance Level for Rebuildable Atomizer Coils

  1. I have a dual coil Fogger 4.0 and I have built the coils for it 3x now and each time I average about .3 ohms on a 3.6v battery and I’m only worried that it might get too hot, I’m using 28 gauge wire and have wrapped it 7x per coil and this time only 5 and wound up with same or almost exact ohms…need assistance raising the ohms to roughly .7 or so, please help

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