Verdampfer & Coils

Atomiser - the heart of your e-cigarette explained

Atomiser guide for e-cigarettes: Structure, function and differences between coils, clearomisers and RDAs. Incl. buying tips and care instructions for beginners.

The atomiser is the part of your e-cigarette where e-liquid is converted into vapour – without it, no vaping setup works. Many beginners underestimate just how much this component affects flavour, vapour production and battery life. If you understand the atomiser, you’ll make better purchasing decisions and avoid typical mistakes such as dry hits, a burnt taste or short coil lifespans. In this guide, you’ll learn about the technical structure of an atomiser, the different designs available and what to look out for when buying or changing one – whether you’re using a simple pod system or a sub-ohm atomiser.

An atomiser is the vaporising unit of an e-cigarette, in which electrical energy is converted into heat to vaporise e-liquid. In German-speaking countries, the atomiser is often simply referred to as a ‘Verdampfer’ or ‘Zerstäuber’ – technically, all three terms refer to the same component.

A typical atomiser consists of four components: a tank or e-liquid reservoir, a heating coil, a wick made of cotton or ceramic, and a mouthpiece (drip tip). As soon as you take a puff on the e-cigarette or press the fire button, electricity flows from the battery through the coil. The coil heats up to around 180 to 250 °C in a fraction of a second, the cotton releases e-liquid, and a fine aerosol mist is produced.

The atomiser should be distinguished from two other terms: the ‘pod’ usually refers to a replaceable cartridge in which the atomiser and tank form a single unit. The ‘clearomiser’ is an atomiser with a transparent tank and a replaceable atomiser head.

Not every atomiser suits every vaping style. The common designs differ in resistance, capacity and target audience.

MTL atomisers (mouth-to-lung)

These atomisers mimic the draw of a traditional cigarette. The coil resistance is typically between 0.8 and 1.8 ohms, with a power output of between 10 and 20 watts. Ideal for nicotine salt e-liquids and beginners.

DTL atomisers (Direct-to-Lung)

A sub-ohm vape atomiser operates below 1.0 ohms, often between 0.15 and 0.4 ohms, and produces dense clouds of vapour. Power range: 40 to 100 watts. Suitable for freebase e-liquids with low nicotine content.

Buildable atomisers (RDA, RTA, RDTA)

Here, you wind the coil yourself and insert the cotton. This offers maximum control over flavour and vapour, but requires experience and an ohmmeter for safety checks.

An atomiser should be compatible with your battery, your e-liquid and your vaping style. The following points will help you choose:

Check compatibility: Most atomisers use the 510 thread, but pod systems have proprietary connections. Check whether the coil fits your e-cigarette’s atomiser.
Match resistance and power: A 0.2-ohm coil on a 15-watt mod produces weak vapour, whilst a 1.2-ohm coil at 80 watts will burn the cotton. Stick to the wattage range printed on the coil.
Choosing tank capacity: Swiss models are not legally limited to 2 ml as they are in the EU. Larger tanks of 4 to 8 ml mean less refilling – particularly handy when you’re on the go.
Airflow control: Adjustable airflow allows you to switch between a tight MTL draw and an open DTL draw. Many entry-level devices lack this option.
Keep spare coils in stock: A coil lasts between 5 and 14 days, depending on usage. Before buying an atomiser, check whether replacement coils are readily available and affordable.

Most common mistake: A new coil is inserted without priming (pre-soaking the cotton with e-liquid) and burns out on the first puff. Always leave the atomiser to stand for 5 to 10 minutes after filling.

How long does an atomiser coil last?

Depending on the e-liquid, power setting and vaping style, between 5 and 14 days. Sweet e-liquids with a high sugar content significantly shorten the lifespan, as residues build up on the coil.

Can I use any e-liquid in any atomiser?

No. Sub-ohm atomisers with low resistance are designed for e-liquids with a high VG content (70/30 or 80/20). Nicotine salt e-liquids are best suited to MTL atomisers with higher resistance.

What is the difference between an atomiser and a coil head?

The atomiser is the complete unit, including the tank and mouthpiece. The atomiser head is simply the replaceable inner part containing the coil and cotton – the wear part.

How can I tell if the atomiser is faulty?

Typical signs: a burnt taste despite a new coil, gurgling, e-liquid leaking from the drip tip, or no vapour despite a fully charged battery. Usually, changing the coil or cleaning the tank is the solution.

The atomiser determines how your e-cigarette tastes, sounds and vapes. With the right resistance, the correct e-liquid composition and a bit of care, your setup will run reliably for weeks. If you want to compare different designs, you’ll find models for every vaping style in our range of atomisers – complemented by suitable coils and e-liquids for adults aged 18 and over. Take your time comparing and choose what suits your everyday life.