Types of coil

There are several types of coil: they can be located at the bottom or top of the clearomizer, depending on its design.

If the coil is located at the top of the clearomizer, the vapor will be hot and conversely if it is at the bottom it will be cold.

The main difference between coils is the resistive wire. They come in different metal alloys and, above all, with different resistance values (expressed in ohm). Resistance value is a very important factor in your choice.

The closer your resistance value is to 0 ohm, the more vapor you'll produce and the less flavour you'll get. Conversely, a value higher than 1 ohm will produce less vapor and more flavour. Resistance below 1 ohm are known as "Subohm" coils, which indicate a low ohm value for high vapor production. Subohm coils have large cotton feed holes to allow the use of e-liquids with a high VG content and thus increase vapor production.

Types of inhalation

Like the clearomizer, the coil has a role to play in the type of inhalation.

For indirect inhalation

Resistors > 1 ohm are preferable, as the vapor will be less plentiful but the draw will be tighter and the aromas better reproduced. Ideal for beginners.

For direct inhalation

Coils should be sub-ohm (< 1 ohm). The vapor is abundant and airy (large air flow), but the flavours are more or less well reproduced, depending on the equipment. With low resistance, nicotine strength should be lower because the abundant vapor will give you too much nicotine. We recommend this type of coil for the most experienced vapers.

Rebuildable coil

As the name suggests, rebuildable coils are made by you. This type of coil can only be made on a rebuildable plate, where you can fit the resistive wire of your choice and the cotton of your choice. This allows you to save money on coils and enjoy your own more or less artistic creations (yes, you can!). For more information, please refer to the expert guide category for creating your coils.

Types of resistance wire

Here are the main types of resistance wire:

Kanthal

Kanthal is the most common alloy used in e-cigarettes, made up of iron, chromium and aluminium. It is highly resistant to high temperatures and has an intermediate resistance that makes it very reactive to heating. It is also widely used for rebuildables and to make your own coils. Kanthal is not used for temperature control, but exclusively for variable wattage or variable voltage.

SS 316 l

SS 316 L (Stainless Steel 316 L) is a stainless steel wire. It is very resistant and has a high resistive power, making it suitable for a large number of appliances. Another special feature is that it can be used for variable wattage or temperature control. A highly versatile wire.

Ni80

Ni80 is an alloy of 80% nickel and 20% chromium. As with the SS316 L, it can be used for variable wattage or temperature control, but its resistivity is fairly low, allowing very low ohm resistances. On a rebuildable plate, it can be used to limit the size of the coil while still providing a low resistance value.

Ni200

Ni200 is not an alloy but purified nickel (approximately 99.6%). It can withstand wide variations in temperature and has a very low resistivity. However, it is very fragile to handle and can only be used for temperature control.

Ti

Ti (titanium) is highly resistant to heating and has a higher resistivity than Ni200. It is also more resistant to handling. Its disadvantage is that it is easily oxidised in ambient air and requires frequent replacement. Like Ni200, this wire is only used for temperature control. This fairly sensitive wire should never be heated to red without cotton or liquid (dry burn).

Ohm's law

Ohm's law is the fundamental rule for your coils.
It is expressed as follows
U= R x I
U: Voltage in volts (V)
I: Current in amperes (A)
R: Resistance in ohms

For an electronic box or battery, it is of no immediate use, as power regulation is automatically managed by the device. But if you make your own coils, you'll learn to juggle with them :-)

Tips

The size of the coil is important. The bigger they are, the greater the draught and the greater the vapor. Be careful, though: big vapor means higher e-liquid consumption and therefore lower nicotine strength. Very thick e-liquids (>50% Vegetable Glycerin) require large e-liquid inlets.