When it comes to e-cigarettes, coils are an integral part of the workings. A coil is the component that heats up the e-liquid, turning it to vapour, and there are a number of different types available.
These different types can also be made of different materials, resulting in varying effects. If you are not already familiar with coils, the following definitions will help you to better understand their workings:
Single coil: one coil.
Dual coil: a double coil.
BDC: bottom dual coil.
BVC: bottom vertical coil
Mesh: meshed steel wire.
Ohms: the unit of resistance.
Wicking: placing material in or around the coil to keep liquid in contact for vaporising.
One of three different materials are generally used in coils:
Kanthal, Ni200 or stainless steel.
Kanthal is used in wattage mode and can easily handle very high temperatures, is easy to work with and is compatible with every device,making it a favourite of many vapers.
Ni200 comprises 99.6% nickel and is ideal for temperature limiting in e-cigarettes. It is the standard wire for temperature control modes and the resistance changes during heating are incredibly predictable, resulting a very consistent vape. The downside to this material is that it can only be used in temperature mode - not wattage mode - and it is more prone to gunk build-up.
Stainless steel is perfect for wattage and temperature control e-cigarettes and is very versatile. It is also easy to work with and holds its shape better, heats quickly and delivers a more instant hit.
The downsides to stainless steel coils are minimal; however, resistance can fluctuate, there is less consistency, and hot spots may become prevalent over time.
There are also two different coil designs that can influence your e-cigarette experience. Vertical coils are considered the norm, with the coil standing upright and surrounded by the wick. This allows for direct airflow over the coil, making vaping consistent in both consistency and flavour.
Horizontal coils may not be as popular; however, they are preferred by some vapers. These coils have inner or outer wicking and the airflow passes up around the coil, heating up in a circular motion. If the coil is not centred properly, airflow may be restricted and result in your device performing poorly; however, when correctly centred, you will enjoy a robust, flavour-filled vape.