There are four modern categories of atomizers: dripping atomizers, cartomizers, clearomizers, and rebuildables. All of them serve the same purpose, although they hold and feed liquid to the coil differently. Dripping atomizers were some of the first devices on the market, although have declined in popularity due to being high maintenance. The user drips several drops of liquid into the atomizer, until the minimum amount of wicking material is saturated, and then uses the device. Using a dripper requires the user to always have a vial of liquid on hand, as the maximum capacity of the atomizer is just a few drops. This can allow the user to take 3 to 5 puffs before having to refill, whereas the tank systems below can last for an entire day without filling. Atomizers can be found here.
Clearomizers use a string-like wick to bring liquid into the coil, keeping the heating element saturated. They are filled through a cap that is either on the top or the bottom of the tube. Though some older units require rebuilding, all of the clearomizers Mister-E-Liquid sells include the ability to be replaced with no rebuilding necessary: the coil unit simply unscrews from the device and a new one is attached. These are the easiest for beginners to learn how to use, as the user just has to take off the fill cap, fill the tank, replace the cap, and let it sit without use for several minutes to allow the wicks to saturate. You can find many different clearomizers here.
Cartomizers are found on most cig-a-like devices. They consist of a metal tube with a coil in the middle that is suspended by filler material. The filler material is fully saturated with e-liquid, then attached to the battery to use. When cartomizers go bad, they are replaced by an entirely new unit. Cartomizers can come with holes in the side casing, from the manufacturer, to allow the use of a tank or cartotank, which is held in place by O-rings. After saturating the wicking material in the cartomizers, the tank is partially slid on and filled through the remaining hole at the top of the device. After the tank is filled, it is slid down the cartomizers ensuring the holes are not blocked. When drawing on a cartotank, a suction is created that pulls liquid from the tank into the filler material of the cartomizers, keeping it saturated. Cartomizers and carto tanks are available here.
Rebuildable atomizers require knowledge in both vaping and circuitry and are meant for advanced-level vapers only. More information on this topic can be found in the 200 level courses of Vaping University.
All prices are in USD